DOC AIRBUS | AMM A320FInstallation of the Trimmable Horizontal Stabilizer (THS) Actuator
TASK 27-44-51-400-001-A
Installation of the Trimmable Horizontal Stabilizer (THS) Actuator
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 27-44-51-550-050-A
Subtask 27-44-51-410-050-A
[Rev.10 from 2021]
2026.03.31 23:51:13 UTC
Installation of the Trimmable Horizontal Stabilizer (THS) Actuator
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
NOTE: If you install a complete new THSA, only item (37) in the expendable parts list is necessary.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | 1 | CAP - BLANKING |
| No specific | 1 | CONTAINER - HYDRAULIC FLUID RESISTANT |
| No specific | 1 | COVER - BLANKING, HYDRAULIC RESISTANT |
| No specific | 1 | GAGE - FEELER |
| No specific | 1 | MAT - PROTECTIVE |
| No specific | AR | PAD - PROTECTIVE FOAM |
| No specific | 1 | RULER 150 MM (6 IN) - METALLIC |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 1 | WRENCH - STANDARD |
| No specific | Torque wrench: range to between 32 and 29 m.N (23.60 and 21.39 lbf.ft )  | |
| No specific | Torque wrench: range to between 59 and 54 m.N (43.51 and 39.82 lbf.ft ) | |
| No specific | Torque wrench: range to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in ) | |
| No specific | Torque wrench: range to between 0.75 and 0.62 m.daN (66.37 and 54.87 lbf.in ) | |
| No specific | Torque wrench: range to between 0.82 and 0.63 m.daN (72.57 and 55.75 lbf.in ) | |
| No specific | Torque wrench: range to between 2.2 and 1.95 m.daN (16.22 and 14.38 lbf.ft ) | |
| No specific | Torque wrench: range to between 4.0 and 3.0 m.daN (29.50 and 22.12 lbf.ft ) | |
| No specific | Torque wrench: range to between 5.0 and 4.0 m.daN (36.87 and 29.50 lbf.ft ) | |
| 0U145920 | 2 | TOOL-MANUAL CRANKING STOP,THS ACTUATOR |
| 0U190360 | 1 | PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER |
| 0U190834 | 1 | TOOL-ZERO POSITIONING,THS ACTUATOR |
| 98D27403500000 | 1 | PITCH TRIM CONTROL LOCKING |
| 98D27407502000 | 1 | SUPPORT STRUT-R I,THS ACTUATOR |
| 98D27407517000 | 1 | TOOL SET-R I,THS |
| 98D27407533000 | 1 | FRAME - THS ACTUATOR SUPPORT |
| OR | OR | |
| 98D27407533001 | 1 | FRAME-THS ACTUATOR,SUPPORT |
| 98D27408624000 | 1 | DEVICE-R I,THS ACTUATOR |
| A1-91-265 | 1 | HOIST-MINILIFT |
| OR | OR | |
| A3-91-267 | 1 | HOIST-MINILIFT,THS ACTUATOR |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.06LCG9) | Non Hardening Jointing Putty-Medium Temp. Area - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.12AGC2) | Corrosion Preventive Compound-- Soft Film System |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 310 | FUSLG TAIL SECTION AFT OF AFT PRESS BHD |
| 312AR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 37 | COTTER PINS | AIPC 27-41-04-04-340 |
| 37 | COTTER PINS | AIPC 27-41-84-07-010 |
| 61 | COTTER PINS | AIPC 27-44-04-03-270 |
| 65 | COTTER PINS | AIPC 27-44-04-03-310 |
| 73 | RETAINER WASHERS | AIPC 27-44-04-03-340 |
| 71 | RETAINER WASHERS | AIPC 27-44-04-03-360 |
| 65 | COTTER PINS | AIPC 27-44-84-01-310 |
| 73 | RETAINER WASHERS | AIPC 27-44-84-01-430 |
| 71 | RETAINER WASHERS | AIPC 27-44-84-01-450 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-22-27-640-003-A | Lubricate THS Actuator Ball Screw Nut |
| TASK 20-23-22-910-001-A | Marking of the Unions after Application of Standard or Specific Tightening Torque |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 20-28-00-912-803-A | Bonding Surface Preparation |
| TASK 27-41-00-730-001-A | System Test of the THS Actuator Electrical Control |
| TASK 27-41-00-820-001-A | Adjustment of the THS Zero Position |
| TASK 27-44-51-210-004-A | Check Oil Level of THS Actuator Gearbox |
| TASK 27-44-51-220-802-A | Detailed Inspection of THSA Ball Screw Shaft Lower Splines |
| TASK 27-44-51-400-802-A | Installation of the Electrical Load Sensing Device |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
Subtask 27-44-51-550-050-A
A. Preparation for Inspection
(1) Before you install a spare THS Actuator, identify the part number and the age of this THS Actuator (refer to the last revision of EASA AD 2012-0175 for more information).
Subtask 27-44-51-860-055-A (1) Before you install a spare THS Actuator, identify the part number and the age of this THS Actuator (refer to the last revision of EASA AD 2012-0175 for more information).
B. Aircraft Maintenance Configuration
(2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below access door 312AR.
(3) Make sure that access door 312AR is open.
(4) In the cockpit, make sure that the pitch-trim control wheel is in the zero position.
(5) Make sure that the 98D27403500000 PITCH TRIM CONTROL LOCKING is installed on the pitch-trim control wheel.
(6) Make sure that the WARNING NOTICE(S) are in position in the cockpit to tell persons not to operate the pitch controls.
(7) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(8) Make sure that the reservoirs of the Green and Yellow hydraulic systems are depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(9) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green and Yellow hydraulic systems:
(11) Make sure that the COVER - BLANKING, HYDRAULIC RESISTANT is in position on the electrical equipment installed in the area of the THS actuator (1).
Subtask 27-44-51-865-054-A WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002). (2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below access door 312AR.
(3) Make sure that access door 312AR is open.
(4) In the cockpit, make sure that the pitch-trim control wheel is in the zero position.
(5) Make sure that the 98D27403500000 PITCH TRIM CONTROL LOCKING is installed on the pitch-trim control wheel.
(6) Make sure that the WARNING NOTICE(S) are in position in the cockpit to tell persons not to operate the pitch controls.
(7) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(8) Make sure that the reservoirs of the Green and Yellow hydraulic systems are depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(9) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green and Yellow hydraulic systems:
- In the cockpit, on overhead panel 40VU
- On the ground service panels of the Green and Yellow hydraulic systems.
(11) Make sure that the COVER - BLANKING, HYDRAULIC RESISTANT is in position on the electrical equipment installed in the area of the THS actuator (1).
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| ** ON A/C ALL | |||
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT3 | 19CE3 | Q17 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
NOTE: The new or overhauled THSA comes with most of its necessary attachment parts. Use these attachment parts when you install the THSA. But for the primary upper attachment it is necessary to use the used attachment parts again.
Subtask 27-44-51-560-050-A A. Preparation of the Replacement Component
(1) Make sure that the replacement Trimmable Horizontal Stabilizer (THS) actuator is in the correct condition.
(2) Make sure that the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER and the 0U190834 TOOL-ZERO POSITIONING,THS ACTUATOR are installed on the replacement THS actuator (1).
(a) Make sure that the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER and the 0U190834 TOOL-ZERO POSITIONING,THS ACTUATOR must stay in position during the installation procedure.
(3) Remove the red protective caps from the ports of the hydraulic valve blocks (31) and (34).
THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL
THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL
(4) Make sure that the identification placards are correctly attached to the casing of the THS actuator (1).
(5) Make sure that the PAD - PROTECTIVE FOAM is in position on the valve outlets of the THS actuator (1) to prevent damage.
Subtask 27-44-51-210-050-A (1) Make sure that the replacement Trimmable Horizontal Stabilizer (THS) actuator is in the correct condition.
(2) Make sure that the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER and the 0U190834 TOOL-ZERO POSITIONING,THS ACTUATOR are installed on the replacement THS actuator (1).
(a) Make sure that the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER and the 0U190834 TOOL-ZERO POSITIONING,THS ACTUATOR must stay in position during the installation procedure.
(3) Remove the red protective caps from the ports of the hydraulic valve blocks (31) and (34).
THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL (5) Make sure that the PAD - PROTECTIVE FOAM is in position on the valve outlets of the THS actuator (1) to prevent damage.
B. Inspection of the Work Area and the Attachment Components
(1) Clean the items that follow with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and let them dry:
(a) Make sure that the items that follow are clean, not damaged and have no corrosion:
(a) Make sure that the items that follow are clean, not damaged and have no corrosion:
Subtask 27-44-51-420-051-A (1) Clean the items that follow with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and let them dry:
- The attachment forks (3)
- The attachment arms (4)
- The bolts
- The bushes.
- The press-fit bushes (56) are not loose in the attachment forks (3).
- The retainer nuts (47) are safetied on the bushes (55).
(a) Make sure that the items that follow are clean, not damaged and have no corrosion:
- The attachment forks (3)
- The attachment arms (4)
- The flexible hoses (32), (33), (35) and (36)
- The mechanical input mechanism
- Electrical connectors 9CE-A, 9CE-B, 9CE-C, 9CE-D, 9CE-E, 9CE-F, 9CE-G and 9CE-H
- The adjacent structure.
(a) Make sure that the items that follow are clean, not damaged and have no corrosion:
- The bolts
- The nuts
- The bushes.
NOTE: There are two spherical bearings installed in the upper attachment of the THS actuator. One spherical bearing is attached in the gimbal ring and the other spherical bearing is free.
(5) Apply the corrosion preventive Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) on the shafts of the bolts (46). C. Installation of the THS Actuator
(1) Put the 98D27407533000 FRAME - THS ACTUATOR SUPPORT98D27407533001 FRAME-THS ACTUATOR,SUPPORT with the THS actuator (1) in position below access door 312AR.
(2) Use the A3-91-267 HOIST-MINILIFT,THS ACTUATORA1-91-265 HOIST-MINILIFT and put the THS actuator (1) in position.
(3) Connect fastener 98D27408624252 from the A3-91-267 HOIST-MINILIFT,THS ACTUATOR to the secondary upper attachment (60). Do this with the pip pins.
(4) Disconnect the THS actuator (1) from the 98D27407533000 FRAME - THS ACTUATOR SUPPORT98D27407533001 FRAME-THS ACTUATOR,SUPPORT as applicable.
(5) Use the A3-91-267 HOIST-MINILIFT,THS ACTUATORA1-91-265 HOIST-MINILIFT and lift the THS actuator (1) through access door 312AR.
(6) Put transport frame 98D27408624046 in position on the THS actuator (1).
(7) Attach transport frame 98D27408624046 to the THS actuator (1) with lifting adaptors 98D27408624258.
(8) Remove the pip pins and disconnect fastener 98D27408624252 from the secondary upper attachment (60).
(9) Move the roller assembly which is attached to transport frame 98D27408624046 along transport rail 98D27408624040.
(10) Put the THS actuator (1) in position in front of the attachment forks (3) and the attachment arms (4).
(11) Make sure that the mechanical input connection is on the left in the flight direction.
(12) Hold the THS actuator (1) in position.
(13) Connect strives 98D27408624100 to transport frame 98D27408624046 with the pip pins.
(14) Adjust the spindle nut to the center on the threaded rod of spindle 98D27408624118.
(15) Connect spindle 98D27408624118 to transport frame 98D27408624046 with the pip pin.
(16) Remove the 98D27407533000 FRAME - THS ACTUATOR SUPPORT98D27407533001 FRAME-THS ACTUATOR,SUPPORT as applicable, from below access door 312AR.
(17) Remove the adhesive tape from the bushes (48), (55) and (56) in the attachment forks (3).
(18) Remove the adhesive tape from the bearing (57) and the gimbal ring (41).
Primary Upper Attachment (for THSA P/N 47145-2XX) ** ON A/C NOT FOR ALL
Primary Upper Attachment (for THSA P/N 47145-1XX) ** ON A/C NOT FOR ALL
(19) Use spindle 98D27408624118 to lift the THS actuator (1).
(20) Use support strut 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR and put the stabilizer in the 0° position.
(21) Connect the primary upper attachment of the THS actuator (1):
(a) Move the sliding bushes (48) to a position where you can install the primary upper attachment.
(b) Put the THS actuator (1) in position at the attachment forks (3).
(c) On the LH side of the THS actuator, push the sliding bush (48) against the bearing (57). Do the same for the RH side.
(d) Engage the bolts (46) at the connections of the attachment forks (3) and the gimbal ring (41). Push in the two bolts (46) fully.
(e) Measure the space between the flange of the bolts (46) and the retainer nuts (47).
(f) Install the washers (45) and the sufficient quantity of shims (44) to fill the measured space between the flange of the bolts (46) and the retainer nuts (47).
(h) TORQUE the screws (42) to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in ).
(i) Safety the screws with lockwire:
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
Subtask 27-44-51-420-060-A ** ON A/C NOT FOR ALL (1) Put the 98D27407533000 FRAME - THS ACTUATOR SUPPORT98D27407533001 FRAME-THS ACTUATOR,SUPPORT with the THS actuator (1) in position below access door 312AR.
(2) Use the A3-91-267 HOIST-MINILIFT,THS ACTUATORA1-91-265 HOIST-MINILIFT and put the THS actuator (1) in position.
(3) Connect fastener 98D27408624252 from the A3-91-267 HOIST-MINILIFT,THS ACTUATOR to the secondary upper attachment (60). Do this with the pip pins.
(4) Disconnect the THS actuator (1) from the 98D27407533000 FRAME - THS ACTUATOR SUPPORT98D27407533001 FRAME-THS ACTUATOR,SUPPORT as applicable.
(5) Use the A3-91-267 HOIST-MINILIFT,THS ACTUATORA1-91-265 HOIST-MINILIFT and lift the THS actuator (1) through access door 312AR.
(6) Put transport frame 98D27408624046 in position on the THS actuator (1).
(7) Attach transport frame 98D27408624046 to the THS actuator (1) with lifting adaptors 98D27408624258.
(8) Remove the pip pins and disconnect fastener 98D27408624252 from the secondary upper attachment (60).
(9) Move the roller assembly which is attached to transport frame 98D27408624046 along transport rail 98D27408624040.
(10) Put the THS actuator (1) in position in front of the attachment forks (3) and the attachment arms (4).
(11) Make sure that the mechanical input connection is on the left in the flight direction.
(12) Hold the THS actuator (1) in position.
(13) Connect strives 98D27408624100 to transport frame 98D27408624046 with the pip pins.
(14) Adjust the spindle nut to the center on the threaded rod of spindle 98D27408624118.
(15) Connect spindle 98D27408624118 to transport frame 98D27408624046 with the pip pin.
(16) Remove the 98D27407533000 FRAME - THS ACTUATOR SUPPORT98D27407533001 FRAME-THS ACTUATOR,SUPPORT as applicable, from below access door 312AR.
(17) Remove the adhesive tape from the bushes (48), (55) and (56) in the attachment forks (3).
(18) Remove the adhesive tape from the bearing (57) and the gimbal ring (41).
Primary Upper Attachment (for THSA P/N 47145-2XX) ** ON A/C NOT FOR ALL Primary Upper Attachment (for THSA P/N 47145-1XX) ** ON A/C NOT FOR ALL (20) Use support strut 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR and put the stabilizer in the 0° position.
(21) Connect the primary upper attachment of the THS actuator (1):
(a) Move the sliding bushes (48) to a position where you can install the primary upper attachment.
(b) Put the THS actuator (1) in position at the attachment forks (3).
(c) On the LH side of the THS actuator, push the sliding bush (48) against the bearing (57). Do the same for the RH side.
(d) Engage the bolts (46) at the connections of the attachment forks (3) and the gimbal ring (41). Push in the two bolts (46) fully.
(e) Measure the space between the flange of the bolts (46) and the retainer nuts (47).
(f) Install the washers (45) and the sufficient quantity of shims (44) to fill the measured space between the flange of the bolts (46) and the retainer nuts (47).
NOTE: The washers (45) are thicker than the washers (43).
(g) Install the screws (42) and the washers (43). (h) TORQUE the screws (42) to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )
. (i) Safety the screws with lockwire:
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
1 Safety the screws (42) with the lockwire D. Installation of the Secondary Upper Attachment of the THS Actuator (for THS Actuator P/N 47145-1XX)
(1) Connect the secondary upper attachment (60) of the THS actuator(1):
(a) Make sure that the bushes (84) are correctly installed in the structure lug.
(b) Put the secondary upper attachment (60) in position on the structure lug.
(c) Make sure that the shouldered bushes (79) are correctly installed in the connection of the secondary upper attachment (60).
(d) Apply the zinc chromate putty Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the bushes (80).
(e) Put the bushes (80) on the bolts (64).
(f) Install the bolts (64) with the bushes (80), the washers (63) and the nuts (62). Do this at the connection of the secondary upper attachment (60) and the structure lug.
(g) TORQUE the nuts (62) to between 2.2 and 1.95 m.daN (16.22 and 14.38 lbf.ft ).
(h) Safety the nuts (62) with the new AIPC 27-44-04-03-270 COTTER PINS (61).
Subtask 27-44-51-420-060-B ** ON A/C NOT FOR ALL (1) Connect the secondary upper attachment (60) of the THS actuator(1):
(a) Make sure that the bushes (84) are correctly installed in the structure lug.
(b) Put the secondary upper attachment (60) in position on the structure lug.
(c) Make sure that the shouldered bushes (79) are correctly installed in the connection of the secondary upper attachment (60).
(d) Apply the zinc chromate putty Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the bushes (80).
(e) Put the bushes (80) on the bolts (64).
(f) Install the bolts (64) with the bushes (80), the washers (63) and the nuts (62). Do this at the connection of the secondary upper attachment (60) and the structure lug.
(g) TORQUE the nuts (62) to between 2.2 and 1.95 m.daN (16.22 and 14.38 lbf.ft )
. (h) Safety the nuts (62) with the new AIPC 27-44-04-03-270 COTTER PINS (61).
D. Installation of the Secondary Upper Attachment and the Electrical Load Sensing Device (ELSD) on the Aircraft for the THS Actuator (for THS Actuator P/N 47145-2XX)
(1) Connect the secondary upper attachment (60) of the THS actuator (1):
(a) Make sure that the bushes (84) are correctly installed in the structure lug.
(b) Put the secondary upper attachment (60) in position on the structure lug.
(c) Make sure that the shouldered bushes (79) are correctly installed in the connection of the secondary upper attachment (60).
(2) Install the ELSD (Ref. AMM TASK 27-44-51-400-802).
Subtask 27-44-51-080-050-A (1) Connect the secondary upper attachment (60) of the THS actuator (1):
(a) Make sure that the bushes (84) are correctly installed in the structure lug.
(b) Put the secondary upper attachment (60) in position on the structure lug.
(c) Make sure that the shouldered bushes (79) are correctly installed in the connection of the secondary upper attachment (60).
(2) Install the ELSD (Ref. AMM TASK 27-44-51-400-802).
E. Removal of the R/I-Device THS Actuator
(1) Remove the pip pin and disconnect fastener 98D27408624252 from the shackle of the A3-91-267 HOIST-MINILIFT,THS ACTUATOR.
(2) Remove the A3-91-267 HOIST-MINILIFT,THS ACTUATORA1-91-265 HOIST-MINILIFT from transport rail 98D27408624040.
(3) Remove the 98D27408624000 DEVICE-R I,THS ACTUATOR:
(a) Remove the pip pin and disconnect spindle 98D27408624118 from transport frame 98D27408624046.
(b) Remove the pip pin and disconnect spindle 98D27408624118 from rod 98D27408624042.
(c) Remove spindle 98D27408624118.
(d) Remove the pip pins and disconnect strives 98D27408624100 from transport frame 98D27408624046.
(e) Remove the pip pins and disconnect strives 98D27408624100 from rod 98D27408624042.
(f) Remove strives 98D27408624100.
(g) Remove lifting adaptors 98D27408624258 and disconnect transport frame 98D27408624046 from the THS actuator (1).
(h) Remove the pip pin and disconnect transport frame 98D27408624046 from the roller assembly of transport rail 98D27408624040.
(i) Remove transport frame 98D27408624046.
(j) Remove the pip pin and disconnect adaptor 98D27408624110 from the structure point at STA3408 (FR71).
(k) Remove the pip pin and disconnect adaptor 98D27408624110 from transport rail 98D27408624040.
(l) Remove adaptor 98D27408624110.
(m) Remove the pip pins and disconnect transport rail 98D27408624040 from the structure points at STA3451 (FR72).
(n) Remove transport rail 98D27408624040.
(o) Remove the pip pins and disconnect rod 98D27408624042 from the structure points at STA3408 (FR71).
(p) Remove rod 98D27408624042.
(q) If necessary, remove the stepladder.
Subtask 27-44-51-420-050-A ** ON A/C NOT FOR ALL (1) Remove the pip pin and disconnect fastener 98D27408624252 from the shackle of the A3-91-267 HOIST-MINILIFT,THS ACTUATOR.
(2) Remove the A3-91-267 HOIST-MINILIFT,THS ACTUATORA1-91-265 HOIST-MINILIFT from transport rail 98D27408624040.
(3) Remove the 98D27408624000 DEVICE-R I,THS ACTUATOR:
(a) Remove the pip pin and disconnect spindle 98D27408624118 from transport frame 98D27408624046.
(b) Remove the pip pin and disconnect spindle 98D27408624118 from rod 98D27408624042.
(c) Remove spindle 98D27408624118.
(d) Remove the pip pins and disconnect strives 98D27408624100 from transport frame 98D27408624046.
(e) Remove the pip pins and disconnect strives 98D27408624100 from rod 98D27408624042.
(f) Remove strives 98D27408624100.
(g) Remove lifting adaptors 98D27408624258 and disconnect transport frame 98D27408624046 from the THS actuator (1).
(h) Remove the pip pin and disconnect transport frame 98D27408624046 from the roller assembly of transport rail 98D27408624040.
(i) Remove transport frame 98D27408624046.
(j) Remove the pip pin and disconnect adaptor 98D27408624110 from the structure point at STA3408 (FR71).
(k) Remove the pip pin and disconnect adaptor 98D27408624110 from transport rail 98D27408624040.
(l) Remove adaptor 98D27408624110.
(m) Remove the pip pins and disconnect transport rail 98D27408624040 from the structure points at STA3451 (FR72).
(n) Remove transport rail 98D27408624040.
(o) Remove the pip pins and disconnect rod 98D27408624042 from the structure points at STA3408 (FR71).
(p) Remove rod 98D27408624042.
(q) If necessary, remove the stepladder.
F. Installation of the Trimmable Horizontal Stabilizer (THS) Actuator
(Ref. AMM TASK 20-28-00-912-803).
(2) Connect the bonding straps (20), (21) and (22) to the THS actuator (1):
(a) Disconnect the bonding straps (20), (21) and (22) from their temporary safety positions.
(b) Put the bonding straps (20), (21) and (22) in position on the brackets (26), (27) and (28).
(c) Install the washers (24), bolts (23) and nuts (25).
2 Bend up the terminal lug of the bonding strap (22) to 30 degrees.
(d) Tighten the nuts (25).
(e) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(3) Connect the Green and the Yellow hydraulic systems to the THS actuator (1):
(a) Put the CONTAINER - HYDRAULIC FLUID RESISTANT in position below the hydraulic valve blocks (31) and (34).
(b) Connect the Yellow hydraulic system:
1 Remove the flexible hoses (35) and (36) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (35) and (36).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (34).
5 Connect the flexible hoses (35) and (36) to the high and the low pressure connections of the valve block (34).
6 TORQUE the union nut of the flexible hose (35) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft ).
7 TORQUE the union nut of the flexible hose (36) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft ).
Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(c) Connect the Green hydraulic system:
1 Remove the flexible hoses (32) and (33) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (32) and (33).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (31).
5 Connect the flexible hoses (32) and (33) to the high and the low pressure connections of the valve block (31).
6 TORQUE the union nut of the flexible hose (32) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft ).
7 TORQUE the union nut of the flexible hose (33) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft ).
Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(4) Connect the primary lower attachment of the THS actuator (1):
(a) Remove the adhesive tape which temporarily safeties the bushes (77) and (78) in the nut assembly (2).
(b) Make sure that the bushes (77) and (78) are correctly installed in the nut assembly (2).
(c) Put the nut assembly (2) in position on the attachment arms (4).
(d) Push the bushes (77) in the direction of the screw shaft centerline.
(e) Put the spacers (76) into the installation nuts of the spherical bearings installed in the attachment arms (4).
(f) Put the bolts (69) in the forks of the nut assembly (2).
(g) Move the THS actuator (1) in position until the two forks of the nut assembly (2) make an overlap on the attachment arms (4).
(h) Push the bushes (77) against the inner ring of the spherical bearings in the attachment arms (4). If necessary, use the 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR and move the THS to align the bushes (77) and the spherical bearings.
(i) (j) Install the primary pins (75) at the connection of the nut assembly (2) and the attachment arms (4).
(k) Make sure that the primary pins (75) are installed with the flats on the flanges in the horizontal direction.
(l) Install the new AIPC 27-44-04-03-340 RETAINER WASHERS (73) or the new AIPC 27-44-84-01-430 RETAINER WASHERS (73) and the retainer nuts (72) on the primary pins (75).
(m) Make sure that the rounded edges of the retainer nuts (72) point to the retainer washers (73).
(n) Tighten the primary pins (75):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (72).
2 Hold the primary pins (75) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (72) to between 5.0 and 4.0 m.daN (36.87 and 29.50 lbf.ft ).
4 Remove the wrenches from the primary pins (75) and the retainer nuts (72).
(o) Safety the retainer nuts (72) with the retainer washers (73).
(p) Install the secondary pins (74) through the primary pins (75).
(q) Make sure that you installed the secondary pins (74) with the flats on the flanges in the horizontal direction.
(r) Install the new AIPC 27-44-04-03-360 RETAINER WASHERS (71) or the new AIPC 27-44-84-01-450 RETAINER WASHERS (71) and the retainer nuts (70) on the secondary pins (74).
(s) Make sure that the rounded edges of the retainer nuts (70) point to the retainer washers (71).
(t) Tighten the secondary pins (74):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (70).
2 Hold the secondary pins (74) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (70) to between 4.0 and 3.0 m.daN (29.50 and 22.12 lbf.ft ).
4 Remove the wrenches from the secondary pins (74) and from the retainer nuts (70).
(u) Safety the retainer nuts (70) with the retainer washers (71).
(v) Remove the nuts (66) to get access to the bolts for the anti-rotation brackets (68).
(w) Put the left and the right anti-rotation brackets (68) in position at the connections of the nut assembly (2), bolts (69) and pins (74) and (75).
(x) Install the nuts (66).
(y) TORQUE the nuts (66) to between 0.75 and 0.62 m.daN (66.37 and 54.87 lbf.in ).
(z) Safety the nuts (66):
(5) Connect the mechanical system link-plate (29) to the input lever (30) of the THS actuator (1):
(a) Put the link plate (29) in position on the input lever (30).
(b) Install the bolts (40), washers (39) and nuts (38).
1 If you cannot install the bolts (40) easily, adjust the mechanical control system (Ref. AMM TASK 27-41-00-820-001).
(c) TORQUE the nuts (38) to between 0.82 and 0.63 m.daN (72.57 and 55.75 lbf.in ).
(d) Safety the nuts (38):
(6) Connect the electrical connections to the THS actuator (1):
(a) Remove the CAP - BLANKING from the electrical connectors:
(c) Connect electrical connectors 9CE-G and 9CE-H (53) to the RVDT monitor (54).
(d) Connect electrical connectors 9CE-A, 9CE-B, 9CE-C and 9CE-D (51) to the pitch trim actuator (52).
(e) Connect electrical connectors 9CE-E and 9CE-F (49) to the RVDT command (50).
Subtask 27-44-51-420-050-B ** ON A/C NOT FOR ALL CAUTION:
USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.
CAUTION:
YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
(1) Prepare the surface of the bonding point(s)(Ref. AMM TASK 20-28-00-912-803).
(2) Connect the bonding straps (20), (21) and (22) to the THS actuator (1):
(a) Disconnect the bonding straps (20), (21) and (22) from their temporary safety positions.
(b) Put the bonding straps (20), (21) and (22) in position on the brackets (26), (27) and (28).
(c) Install the washers (24), bolts (23) and nuts (25).
CAUTION:
MAKE SURE THAT THE TERMINAL LUG OF THE BONDING STRAP IS IN THE CORRECT DIRECTION. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.
1 Install the terminal lug of the bonding strap (22) on the THS actuator (1) in the flight direction. 2 Bend up the terminal lug of the bonding strap (22) to 30 degrees.
(d) Tighten the nuts (25).
(e) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(3) Connect the Green and the Yellow hydraulic systems to the THS actuator (1):
(a) Put the CONTAINER - HYDRAULIC FLUID RESISTANT in position below the hydraulic valve blocks (31) and (34).
(b) Connect the Yellow hydraulic system:
1 Remove the flexible hoses (35) and (36) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (35) and (36).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (34).
5 Connect the flexible hoses (35) and (36) to the high and the low pressure connections of the valve block (34).
6 TORQUE the union nut of the flexible hose (35) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft )
. 7 TORQUE the union nut of the flexible hose (36) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft )
. Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
a Safety the union nuts of the flexible hoses (35) and (36) to the valve block (34) with the (c) Connect the Green hydraulic system:
1 Remove the flexible hoses (32) and (33) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (32) and (33).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (31).
5 Connect the flexible hoses (32) and (33) to the high and the low pressure connections of the valve block (31).
6 TORQUE the union nut of the flexible hose (32) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft )
. 7 TORQUE the union nut of the flexible hose (33) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft )
. Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
a Safety the union nuts of the flexible hoses (32) and (33) to the valve block (31) with the (4) Connect the primary lower attachment of the THS actuator (1):
(a) Remove the adhesive tape which temporarily safeties the bushes (77) and (78) in the nut assembly (2).
(b) Make sure that the bushes (77) and (78) are correctly installed in the nut assembly (2).
(c) Put the nut assembly (2) in position on the attachment arms (4).
(d) Push the bushes (77) in the direction of the screw shaft centerline.
(e) Put the spacers (76) into the installation nuts of the spherical bearings installed in the attachment arms (4).
(f) Put the bolts (69) in the forks of the nut assembly (2).
(g) Move the THS actuator (1) in position until the two forks of the nut assembly (2) make an overlap on the attachment arms (4).
(h) Push the bushes (77) against the inner ring of the spherical bearings in the attachment arms (4). If necessary, use the 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR and move the THS to align the bushes (77) and the spherical bearings.
(i) (j) Install the primary pins (75) at the connection of the nut assembly (2) and the attachment arms (4).
(k) Make sure that the primary pins (75) are installed with the flats on the flanges in the horizontal direction.
(l) Install the new AIPC 27-44-04-03-340 RETAINER WASHERS (73) or the new AIPC 27-44-84-01-430 RETAINER WASHERS (73) and the retainer nuts (72) on the primary pins (75).
(m) Make sure that the rounded edges of the retainer nuts (72) point to the retainer washers (73).
(n) Tighten the primary pins (75):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (72).
2 Hold the primary pins (75) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (72) to between 5.0 and 4.0 m.daN (36.87 and 29.50 lbf.ft )
. 4 Remove the wrenches from the primary pins (75) and the retainer nuts (72).
(o) Safety the retainer nuts (72) with the retainer washers (73).
(p) Install the secondary pins (74) through the primary pins (75).
(q) Make sure that you installed the secondary pins (74) with the flats on the flanges in the horizontal direction.
(r) Install the new AIPC 27-44-04-03-360 RETAINER WASHERS (71) or the new AIPC 27-44-84-01-450 RETAINER WASHERS (71) and the retainer nuts (70) on the secondary pins (74).
(s) Make sure that the rounded edges of the retainer nuts (70) point to the retainer washers (71).
(t) Tighten the secondary pins (74):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (70).
2 Hold the secondary pins (74) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (70) to between 4.0 and 3.0 m.daN (29.50 and 22.12 lbf.ft )
. 4 Remove the wrenches from the secondary pins (74) and from the retainer nuts (70).
(u) Safety the retainer nuts (70) with the retainer washers (71).
(v) Remove the nuts (66) to get access to the bolts for the anti-rotation brackets (68).
(w) Put the left and the right anti-rotation brackets (68) in position at the connections of the nut assembly (2), bolts (69) and pins (74) and (75).
(x) Install the nuts (66).
(y) TORQUE the nuts (66) to between 0.75 and 0.62 m.daN (66.37 and 54.87 lbf.in )
.(z) Safety the nuts (66):
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
1 Safety the nuts (66) with the new AIPC 27-44-04-03-310 COTTER PINS (65) or the new AIPC 27-44-84-01-310 COTTER PINS (65). (5) Connect the mechanical system link-plate (29) to the input lever (30) of the THS actuator (1):
(a) Put the link plate (29) in position on the input lever (30).
(b) Install the bolts (40), washers (39) and nuts (38).
1 If you cannot install the bolts (40) easily, adjust the mechanical control system (Ref. AMM TASK 27-41-00-820-001).
(c) TORQUE the nuts (38) to between 0.82 and 0.63 m.daN (72.57 and 55.75 lbf.in )
. (d) Safety the nuts (38):
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
1 Safety the nuts (38) with the new AIPC 27-41-04-04-340 COTTER PINS (37) or the new AIPC 27-41-84-07-010 COTTER PINS (37). (6) Connect the electrical connections to the THS actuator (1):
(a) Remove the CAP - BLANKING from the electrical connectors:
- 9CE-A, 9CE-B, 9CE-C and 9CE-D (51)
- 9CE-E and 9CE-F (49)
- 9CE-G and 9CE-H (53).
(c) Connect electrical connectors 9CE-G and 9CE-H (53) to the RVDT monitor (54).
(d) Connect electrical connectors 9CE-A, 9CE-B, 9CE-C and 9CE-D (51) to the pitch trim actuator (52).
(e) Connect electrical connectors 9CE-E and 9CE-F (49) to the RVDT command (50).
F. Installation of the Trimmable Horizontal Stabilizer (THS) Actuator
(Ref. AMM TASK 20-28-00-912-803).
(2) Connect the bonding straps (20), (21) and (22) to the THS actuator (1):
(a) Disconnect the bonding straps (20), (21) and (22) from the temporary safety positions.
(b) Put the bonding straps (20), (21) and (22) in position on the brackets (26), (27) and (28).
(c) Install the bolts (23), washers (24) and nuts (25):
2 Put the upper terminal lug of the bonding strap (22) in position, 45 degrees from the flight direction.
3 Bend up the lower terminal lug of the bonding strap (22) to 45 degrees.
(d) Tighten the nuts (25).
(e) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(3) Connect the Green and the Yellow hydraulic systems to the THS actuator (1):
(a) Put the CONTAINER - HYDRAULIC FLUID RESISTANT in position below the hydraulic valve blocks (31) and (34).
(b) Connect the Yellow hydraulic system:
1 Remove the flexible hoses (35) and (36) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (35) and (36).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (34).
5 Connect the flexible hoses (35) and (36) to the high and the low pressure connections of the valve block (34).
6 TORQUE the union nut of the flexible hose (35) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft ).
7 TORQUE the union nut of the flexible hose (36) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft ).
Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(c) Connect the Green hydraulic system:
1 Remove the flexible hoses (32) and (33) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (32) and (33).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (31).
5 Connect the flexible hoses (32) and (33) to the high and the low pressure connections of the valve block (31).
6 TORQUE the union nut of the flexible hose (32) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft ).
7 TORQUE the union nut of the flexible hose (33) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft ).
Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(4) Connect the primary lower attachment of the THS actuator (1):
(a) Remove the adhesive tape which temporarily safeties the bushes (77) and (78) in the nut assembly (2).
(b) Make sure that the bushes (77) and (78) are correctly installed in the nut assembly (2).
(c) Put the nut assembly (2) in position on the attachment arms (4).
(d) Push the bushes (77) in the direction of the screw shaft centerline.
(e) Put the spacers (76) into the installation nuts of the spherical bearings installed in the attachment arms (4).
(f) Put the bolts (69) in the forks of the nut assembly (2).
(g) Move the THS actuator (1) in position until the two forks of the nut assembly (2) make an overlap on the attachment arms (4).
(h) Push the bushes (77) against the inner ring of the spherical bearings in the attachment arms (4). If necessary, use the 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR and move the THS to align the bushes (77) and the spherical bearings.
(i) (j) Install the primary pins (75) at the connection of the nut assembly (2) and the attachment arms (4).
(k) Make sure that the primary pins (75) are installed with the flats on the flanges in the horizontal direction.
(l) Install the new AIPC 27-44-04-03-340 RETAINER WASHERS (73) or the new AIPC 27-44-84-01-430 RETAINER WASHERS (73) and the retainer nuts (72) on the primary pins (75).
(m) Make sure that the rounded edges of the retainer nuts (72) point to the retainer washers (73).
(n) Tighten the primary pins (75):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (72).
2 Hold the primary pins (75) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (72) to between 5.0 and 4.0 m.daN (36.87 and 29.50 lbf.ft ).
4 Remove the wrenches from the primary pins (75) and the retainer nuts (72).
(o) Safety the retainer nuts (72) with the retainer washers (73).
(p) Install the secondary pins (74) through the primary pins (75).
(q) Make sure that you installed the secondary pins (74) with the flats on the flanges in the horizontal direction.
(r) Install the new AIPC 27-44-04-03-360 RETAINER WASHERS (71) or the new AIPC 27-44-84-01-450 RETAINER WASHERS (71) and the retainer nuts (70) on the secondary pins (74).
(s) Make sure that the rounded edges of the retainer nuts (70) point to the retainer washers (71).
(t) Tighten the secondary pins (74):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (70).
2 Hold the secondary pins (74) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (70) to between 4.0 and 3.0 m.daN (29.50 and 22.12 lbf.ft ).
4 Remove the wrenches from the secondary pins (74) and from the retainer nuts (70).
(u) Safety the retainer nuts (70) with the retainer washers (71).
(v) Remove the nuts (66) to get access to the bolts for the anti-rotation brackets (68).
(w) Put the left and the right anti-rotation brackets (68) in position at the connections of the nut assembly (2), bolts (69) and pins (74) and (75).
(x) Install the nuts (66).
(y) TORQUE the nuts (66) to between 0.75 and 0.62 m.daN (66.37 and 54.87 lbf.in ).
(z) Safety the nuts (66):
(5) Connect the mechanical system link-plate (29) to the input lever (30) of the THS actuator (1):
(a) Put the link plate (29) in position on the input lever (30).
(b) Install the bolts (40), washers (39) and nuts (38).
1 If you cannot install the bolts (40) easily, adjust the mechanical control system (Ref. AMM TASK 27-41-00-820-001).
(c) TORQUE the nuts (38) to between 0.82 and 0.63 m.daN (72.57 and 55.75 lbf.in ).
(d) Safety the nuts (38):
(6) Connect the electrical connections to the THS actuator (1):
(a) Remove the CAP - BLANKING from the electrical connectors:
(c) Connect electrical connectors 9CE-G and 9CE-H (53) to the RVDT monitor (54).
(d) Connect electrical connectors 9CE-A, 9CE-B, 9CE-C and 9CE-D (51) to the pitch trim actuator (52).
(e) Connect electrical connectors 9CE-E and 9CE-F (49) to the RVDT command (50).
Subtask 27-44-51-860-051-A CAUTION:
USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.
CAUTION:
YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
(1) Prepare the surface of the bonding point(s)(Ref. AMM TASK 20-28-00-912-803).
(2) Connect the bonding straps (20), (21) and (22) to the THS actuator (1):
(a) Disconnect the bonding straps (20), (21) and (22) from the temporary safety positions.
(b) Put the bonding straps (20), (21) and (22) in position on the brackets (26), (27) and (28).
(c) Install the bolts (23), washers (24) and nuts (25):
CAUTION:
MAKE SURE THAT THE TERMINAL LUG OF THE BONDING STRAP IS IN THE CORRECT DIRECTION. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.
1 Put the upper terminal lug of the bonding strap (20) in position, 45 degrees from the flight direction.2 Put the upper terminal lug of the bonding strap (22) in position, 45 degrees from the flight direction.
3 Bend up the lower terminal lug of the bonding strap (22) to 45 degrees.
(d) Tighten the nuts (25).
(e) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(3) Connect the Green and the Yellow hydraulic systems to the THS actuator (1):
(a) Put the CONTAINER - HYDRAULIC FLUID RESISTANT in position below the hydraulic valve blocks (31) and (34).
(b) Connect the Yellow hydraulic system:
1 Remove the flexible hoses (35) and (36) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (35) and (36).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (34).
5 Connect the flexible hoses (35) and (36) to the high and the low pressure connections of the valve block (34).
6 TORQUE the union nut of the flexible hose (35) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft )
.7 TORQUE the union nut of the flexible hose (36) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft )
.Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
a Safety the union nuts of the flexible hoses (35) and (36) to the valve block (34) with the (c) Connect the Green hydraulic system:
1 Remove the flexible hoses (32) and (33) from their temporary attachment positions on the structure.
2 Remove the CAP - BLANKING from the flexible hoses (32) and (33).
3 Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the threads of the line end fittings.
4 Remove the CAP - BLANKING from the hose connections of the valve block (31).
5 Connect the flexible hoses (32) and (33) to the high and the low pressure connections of the valve block (31).
6 TORQUE the union nut of the flexible hose (32) to between 32 and 29 m.N (23.60 and 21.39 lbf.ft )
.7 TORQUE the union nut of the flexible hose (33) to between 59 and 54 m.N (43.51 and 39.82 lbf.ft )
.Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
8 Safety the union nuts with lockwire:
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
a Safety the union nuts of the flexible hoses (32) and (33) to the valve block (31) with the (4) Connect the primary lower attachment of the THS actuator (1):
(a) Remove the adhesive tape which temporarily safeties the bushes (77) and (78) in the nut assembly (2).
(b) Make sure that the bushes (77) and (78) are correctly installed in the nut assembly (2).
(c) Put the nut assembly (2) in position on the attachment arms (4).
(d) Push the bushes (77) in the direction of the screw shaft centerline.
(e) Put the spacers (76) into the installation nuts of the spherical bearings installed in the attachment arms (4).
(f) Put the bolts (69) in the forks of the nut assembly (2).
(g) Move the THS actuator (1) in position until the two forks of the nut assembly (2) make an overlap on the attachment arms (4).
(h) Push the bushes (77) against the inner ring of the spherical bearings in the attachment arms (4). If necessary, use the 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR and move the THS to align the bushes (77) and the spherical bearings.
(i) (j) Install the primary pins (75) at the connection of the nut assembly (2) and the attachment arms (4).
(k) Make sure that the primary pins (75) are installed with the flats on the flanges in the horizontal direction.
(l) Install the new AIPC 27-44-04-03-340 RETAINER WASHERS (73) or the new AIPC 27-44-84-01-430 RETAINER WASHERS (73) and the retainer nuts (72) on the primary pins (75).
(m) Make sure that the rounded edges of the retainer nuts (72) point to the retainer washers (73).
(n) Tighten the primary pins (75):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (72).
2 Hold the primary pins (75) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (72) to between 5.0 and 4.0 m.daN (36.87 and 29.50 lbf.ft )
.4 Remove the wrenches from the primary pins (75) and the retainer nuts (72).
(o) Safety the retainer nuts (72) with the retainer washers (73).
(p) Install the secondary pins (74) through the primary pins (75).
(q) Make sure that you installed the secondary pins (74) with the flats on the flanges in the horizontal direction.
(r) Install the new AIPC 27-44-04-03-360 RETAINER WASHERS (71) or the new AIPC 27-44-84-01-450 RETAINER WASHERS (71) and the retainer nuts (70) on the secondary pins (74).
(s) Make sure that the rounded edges of the retainer nuts (70) point to the retainer washers (71).
(t) Tighten the secondary pins (74):
1 Put the hook wrench, part of the 98D27407517000 TOOL SET-R I,THS, in position on the retainer nuts (70).
2 Hold the secondary pins (74) with the WRENCH - STANDARD.
3 TORQUE the retainer nuts (70) to between 4.0 and 3.0 m.daN (29.50 and 22.12 lbf.ft )
. 4 Remove the wrenches from the secondary pins (74) and from the retainer nuts (70).
(u) Safety the retainer nuts (70) with the retainer washers (71).
(v) Remove the nuts (66) to get access to the bolts for the anti-rotation brackets (68).
(w) Put the left and the right anti-rotation brackets (68) in position at the connections of the nut assembly (2), bolts (69) and pins (74) and (75).
(x) Install the nuts (66).
(y) TORQUE the nuts (66) to between 0.75 and 0.62 m.daN (66.37 and 54.87 lbf.in )
.(z) Safety the nuts (66):
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
1 Safety the nuts (66) with the new AIPC 27-44-04-03-310 COTTER PINS (65) or the new AIPC 27-44-84-01-310 COTTER PINS (65). (5) Connect the mechanical system link-plate (29) to the input lever (30) of the THS actuator (1):
(a) Put the link plate (29) in position on the input lever (30).
(b) Install the bolts (40), washers (39) and nuts (38).
1 If you cannot install the bolts (40) easily, adjust the mechanical control system (Ref. AMM TASK 27-41-00-820-001).
(c) TORQUE the nuts (38) to between 0.82 and 0.63 m.daN (72.57 and 55.75 lbf.in )
. (d) Safety the nuts (38):
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
1 Safety the nuts (38) with the new AIPC 27-41-04-04-340 COTTER PINS (37) or the new AIPC 27-41-84-07-010 COTTER PINS (37). (6) Connect the electrical connections to the THS actuator (1):
(a) Remove the CAP - BLANKING from the electrical connectors:
- 9CE-A, 9CE-B, 9CE-C and 9CE-D (51)
- 9CE-E and 9CE-F (49)
- 9CE-G and 9CE-H (53).
(c) Connect electrical connectors 9CE-G and 9CE-H (53) to the RVDT monitor (54).
(d) Connect electrical connectors 9CE-A, 9CE-B, 9CE-C and 9CE-D (51) to the pitch trim actuator (52).
(e) Connect electrical connectors 9CE-E and 9CE-F (49) to the RVDT command (50).
G. Aircraft Maintenance Configuration
THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL
THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL
(1) Remove the 98D27407502000 SUPPORT STRUT-R I,THS ACTUATOR from the THS.
(2) Remove the bolts (81) and the 0U145920 TOOL-MANUAL CRANKING STOP,THS ACTUATOR (82) from the screw jack (83). Do this on each side of the nut assembly (2) of the THS actuator (1).
(3) Remove the 0U190834 TOOL-ZERO POSITIONING,THS ACTUATOR from between the THS actuator (1) and the nut assembly (2).
(4) Remove the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER from the mechanical input of the THS actuator (1).
(5) Remove the 98D27403500000 PITCH TRIM CONTROL LOCKING from the pitch-trim control wheel in the flight compartment.
(6) Remove the storage cap (6) from the oil filler plug (5) and install the oil breather cap (7).
(7) Remove the drainage container from below the hydraulic valve blocks of the THS actuator.
(8) Remove the covers from the electrical equipment which is installed below the THS actuator.
(9) Remove the structural protection material from the work area.
Subtask 27-44-51-220-057-A THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL THS Actuator - Bonding Leads, Mechanical Input and Hydraulic Connections ** ON A/C NOT FOR ALL (2) Remove the bolts (81) and the 0U145920 TOOL-MANUAL CRANKING STOP,THS ACTUATOR (82) from the screw jack (83). Do this on each side of the nut assembly (2) of the THS actuator (1).
(3) Remove the 0U190834 TOOL-ZERO POSITIONING,THS ACTUATOR from between the THS actuator (1) and the nut assembly (2).
(4) Remove the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER from the mechanical input of the THS actuator (1).
(5) Remove the 98D27403500000 PITCH TRIM CONTROL LOCKING from the pitch-trim control wheel in the flight compartment.
(6) Remove the storage cap (6) from the oil filler plug (5) and install the oil breather cap (7).
(7) Remove the drainage container from below the hydraulic valve blocks of the THS actuator.
(8) Remove the covers from the electrical equipment which is installed below the THS actuator.
(9) Remove the structural protection material from the work area.
H. Inspection for Corrosion (If Necessary)
Subtask 27-44-51-865-051-A NOTE: This corrosion inspection is only necessary if the age of the installed THS actuator is more than 20 years and if you did no corrosion inspection ( refer to the requirements given in Subtask 27-44-51-550-05-A in Para 3. Job Set-up).
(1) Examine the installed THS actuator carefully for corrosion (Ref. AMM TASK 27-44-51-220-802) and refer to Vendor SB 47145-27-16 (AIRBUS SB 27-1214) or to MPD 274451-12. NOTE: You can do this inspection only if the THS actuator is installed because you must remove the lower claw stop (refer to the AMM-Task which is given above).
(2) You can do this inspection only if the THS actuator is installed because you must remove the lower claw stop (Ref. AMM TASK 27-44-51-220-802).I. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-44-51-720-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| ** ON A/C ALL | |||
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT3 | 19CE3 | Q17 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
J. Test
(2) Make sure that the THS actuator (1) has the correct quantity of oil. If necessary, fill the THS actuator (Ref. AMM TASK 27-44-51-210-004).
(3) Do a system test of the THS control (Ref. AMM TASK 27-41-00-730-001).
(4) Do a visual check of the THS actuator and make sure that there is no leakage from:
Subtask 27-44-51-210-065-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Lubricate the THS actuator ball-screw nut (Ref. AMM TASK 12-22-27-640-003). (2) Make sure that the THS actuator (1) has the correct quantity of oil. If necessary, fill the THS actuator (Ref. AMM TASK 27-44-51-210-004).
(3) Do a system test of the THS control (Ref. AMM TASK 27-41-00-730-001).
(4) Do a visual check of the THS actuator and make sure that there is no leakage from:
- The hydraulic connections
- The oil filler-plug connection
- The oil drain-plug connection
- The body of the THS actuator.
K. Final Inspection of the THS Actuator
(1) Examine the lower attachment on the THS actuator:
(a) Make sure that the parts that follow are installed on the LH and RH side:
2 If the clearances are less than 0.5 mm (0.020 in.), replace the THS actuator again.
(a) Make sure that the parts that follow are installed on the LH and RH sides:
(a) Make sure that the parts that follow are installed:
Subtask 27-44-51-210-065-B (1) Examine the lower attachment on the THS actuator:
(a) Make sure that the parts that follow are installed on the LH and RH side:
- The pins (74) and (75)
- The brackets (68)
- The nuts (66)
- The cotter pins (65)
- The retainer nuts (70) and (72)
- The retainer washers (71) and (73)
- The bushes (78).
- Use a GAGE - FEELER of 0.5 mm (0.020 in.) to measure these clearances.
2 If the clearances are less than 0.5 mm (0.020 in.), replace the THS actuator again.
NOTE: If this occurs, it is because you did not install one of the spacers (76) or one of the bushes (77) or (78). Because one spacer/bush was missing, you torqued the primary pin (75) against the THS actuator lugs which then caused damage to the component.
(2) Examine the upper primary attachment on the THS actuator: (a) Make sure that the parts that follow are installed on the LH and RH sides:
- The bearings (57)
- The bushes (56)
- The locking washers (55)
- The retainer nuts (47)
- The washers (44) and (if applicable) the shim(s) (45)
- The attaching screws (42)
- The locking wires.
- Make sure that the depth is between 6.0 mm (0.236 in.) and 7.5 mm (0.295 in.).
Measure from the radius of the two sides of the bolt (46).
(a) Make sure that the parts that follow are installed:
- The bolts (64)
- The washers (63)
- The nuts (62)
- The cotter pins (61).
K. Final Inspection of the THS Actuator
(1) Examine the lower attachment on the Trimmable Horizontal Stabilizer (THS) actuator:
(a) Make sure that the parts that follow are installed on the LH and RH sides:
2 If the clearances are less than 0.5 mm (0.020 in.), replace the THS actuator again.
(a) Make sure that the parts that follow are installed on the LH and RH sides:
(a) Make sure that the parts that follow are installed:
(c) Make sure that the bonding strap (88), the protective cap EN3645-F3B0 (59) and the test plug (67) are correctly installed.
Subtask 27-44-51-210-065-C ** ON A/C NOT FOR ALL (1) Examine the lower attachment on the Trimmable Horizontal Stabilizer (THS) actuator:
(a) Make sure that the parts that follow are installed on the LH and RH sides:
- The pins (74) and (75)
- The brackets (68)
- The nuts (66)
- The cotter pins (65)
- The retainer nuts (70) and (72)
- The retainer washers (71) and (73)
- The bushes (78).
- Use a GAGE - FEELER of 0.5 mm (0.020 in.) to measure these clearances.
2 If the clearances are less than 0.5 mm (0.020 in.), replace the THS actuator again.
NOTE: If this occurs, it is because you did not install one of the spacers (76) or one of the bushes (77) or (78). Because one spacer/bush was missing, you torqued the primary pin (75) against the THS actuator lugs which then caused damage to the component.
(2) Examine the upper primary attachment on the THS actuator: (a) Make sure that the parts that follow are installed on the LH and RH sides:
- The bearings (57)
- The bushes (56)
- The locking washers (55)
- The retainer nuts (47)
- The washers (44) and (if applicable) the shim(s) (45)
- The attaching screws (42)
- The locking wires.
- Make sure that the depth is between 6.0 mm (0.236 in.) and 7.5 mm (0.295 in.).
Measure from the radius of the two sides of the bolt (46).
(a) Make sure that the parts that follow are installed:
- The ELSD (58)
- The springboxes (85)
- The locking washers (86)
- The nuts (87).
(c) Make sure that the bonding strap (88), the protective cap EN3645-F3B0 (59) and the test plug (67) are correctly installed.
K. Final Inspection of the THS Actuator
(1) Examine the lower attachment on the THS actuator:
(a) Make sure that the parts that follow are installed on the LH and RH sides:
2 If the clearances are less than 0.5 mm (0.020 in.), replace the THS actuator again.
(a) Make sure that the parts that follow are installed on the LH and RH sides:
(a) Make sure that the parts that follow are installed:
(c) Make sure that the bonding strap (89), the electrical connector (88) and the test plug (67) are correctly installed.
5. Close-up(1) Examine the lower attachment on the THS actuator:
(a) Make sure that the parts that follow are installed on the LH and RH sides:
- The pins (74) and (75)
- The brackets (68)
- The nuts (66)
- The cotter pins (65)
- The retainer nuts (70) and (72)
- The retainer washers (71) and (73)
- The bushes (78).
- Use a GAGE - FEELER of 0.5 mm (0.020 in.) to measure these clearances.
2 If the clearances are less than 0.5 mm (0.020 in.), replace the THS actuator again.
NOTE: If this occurs, it is because you did not install one of the spacers (76) or one of the bushes (77) or (78). Because one spacer/bush was missing, you torqued the primary pin (75) against the THS actuator lugs which then caused damage to the component.
(2) Examine the upper primary attachment on the THS actuator: (a) Make sure that the parts that follow are installed on the LH and RH sides:
- The bearings (57)
- The bushes (56)
- The locking washers (55)
- The retainer nuts (47)
- The washers (44) and (if applicable) the shim(s) (45)
- The attaching screws (42)
- The locking wires.
- Make sure that the depth is between 6.0 mm (0.236 in.) and 7.5 mm (0.295 in.).
Measure from the radius of the two sides of the bolt (46).
(a) Make sure that the parts that follow are installed:
- The ELSD (58)
- The springboxes (85)
- The locking washers (86)
- The nuts (87).
(c) Make sure that the bonding strap (89), the electrical connector (88) and the test plug (67) are correctly installed.
Subtask 27-44-51-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 312AR.
(3) Remove the access platform.
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(5) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 312AR.
(3) Remove the access platform.
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(5) Remove the WARNING NOTICE(S).