DOC AIRBUS | AMM A320FInstallation of the Vertical Stabilizer
TASK 55-31-11-400-001-A
Installation of the Vertical Stabilizer
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 55-31-11-860-055-A
Subtask 55-31-11-560-050-A
Subtask 55-31-11-410-050-A
[Rev.10 from 2021]
2026.04.01 12:51:22 UTC
Installation of the Vertical Stabilizer
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.
ZONE: 320
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | CRANE 1000KG (2200 LB) |
| No specific | 1 | WRENCH - STANDARD |
| No specific | Torque wrench: range to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in )  | |
| No specific | Torque wrench: range to between 7.35 and 6.65 m.daN (54.20 and 49.04 lbf.ft ) | |
| No specific | Torque wrench: range to between 20 and 18 m.daN (147.49 and 132.74 lbf.ft ) | |
| No specific | Torque wrench: range to between 31.5 and 28.5 m.daN (232.30 and 210.18 lbf.ft ) | |
| 98A55308440001 | 1 | SLING-UNIVERSAL,TAILPLANE |
| 98D55307503001 | 1 | CENTERING BOLT SET - VERTICAL STABILIZER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03HBD9) | Synthetic Ester base Grease-General Purpose Low Temp - |
| (Material No.08BBC1) | Non Aqueous Cleaner-- Naphta based and Alcohol - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 320 | VERTICAL STABILIZER AND RUDDER |
| 312AR, 321AL, 323AL, 323AR, 325AL, 325AR, 325BL, 325BR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 53 | COTTER PINS | AIPC 27-21-04-21-120 |
| 53 | COTTER PINS | AIPC 27-21-84-08-010 |
| 40 | COTTER PINS | AIPC 55-31-04-02-190 |
| 48 | COTTER PINS | AIPC 55-31-04-03-190 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 11-00-00-400-022-A | Installation of the Hoisting-Point Cover Patches |
| TASK 20-21-12-911-001-A | Tightening Torques for Pipe Unions (not for OXYGEN Unions) |
| TASK 20-22-00-400-001-A | Installation of STA-LOK Nuts and Lockwashers |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 23-11-00-710-001-A | Operational Test of the High Frequency (HF) System |
| TASK 27-21-00-720-002-A | Functional Test of the Rudder Mechanical Control |
| TASK 27-25-00-820-001-A | Adjustment of the Rudder Position Indicating |
| 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 34-55-00-710-001-A | Operational Test of the VOR/MKR |
| TASK 53-45-11-400-001-A | Installation of the Dorsal Fin |
| TASK 53-55-11-400-001-A | Installation of the Vertical Stabilizer Fairings |
| TASK 53-55-12-400-001-A | Installation of the Rudder Fairings |
| TASK 55-33-13-410-002-A | Closing/Installation of the Trailing Edge Access-Panels of the Vertical Stabilizer |
| TASK 55-43-19-400-001-A | Installation of the Rudder Fillet Fairing |
Transverse Load Forks and Tapered Attach BoltsSubtask 55-31-11-860-055-A
A. Aircraft Maintenance Configuration
(1) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the flight controls.
(2) Make sure that the ACCESS PLATFORM 8M (26 FT) - ADJUSTABLE is in position.
(3) Make sure that the Green, Blue and Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-00-00-864-001) (Ref. AMM TASK 29-00-00-910-002).
(4) Make sure that the rigging pins are installed.
Subtask 55-31-11-865-053-A (1) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the flight controls.
(2) Make sure that the ACCESS PLATFORM 8M (26 FT) - ADJUSTABLE is in position.
(3) Make sure that the Green, Blue and Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-00-00-864-001) (Ref. AMM TASK 29-00-00-910-002).
(4) Make sure that the rigging pins are installed.
B. 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 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | B04 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | B03 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HF1 | 1RE1 | HA14 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | H10 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | H09 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 105VU | FLT CTL/SEC1/STBY SPLY | 22CE | B01 |
| 121VU | COM NAV/VOR/2 | 2RS2 | K08 |
| 121VU | AUTO FLT/RUDDER/TRIM/IND | 15CC | M20 |
| 121VU | AUTO FLT/FAC2/28VDC | 5CC2 | M19 |
| 121VU | AUTO FLT/FAC2/26VAC | 14CC2 | M18 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT3 | 19CE3 | Q17 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
Subtask 55-31-11-560-050-A
A. Prepare the Vertical Stabilizer for Installation
(1) Clean all vertical stabilizer attach fittings with Non Aqueous Cleaner-- Naphta based and Alcohol - (Material No.08BBC1) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Clean the component interfaces and the adjacent area.
(4) Do an inspection of the component interfaces and the adjacent area.
Subtask 55-31-11-420-053-B (1) Clean all vertical stabilizer attach fittings with Non Aqueous Cleaner-- Naphta based and Alcohol - (Material No.08BBC1) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Clean the component interfaces and the adjacent area.
(4) Do an inspection of the component interfaces and the adjacent area.
B. Installation of the Vertical Stabilizer
(1) Put the CRANE 1000KG (2200 LB) with the 98A55308440001 SLING-UNIVERSAL,TAILPLANE in position. Attach the cables to the lift lugs.
(2) Remove the support connections and lift the vertical stabilizer clear of the support. Move it to the install position on the aircraft.
(3) Operate the crane and slowly tighten the sling cables and adjust the turnbuckles as necessary to get an equal tension.
(4) Install the 98D55307503001 CENTERING BOLT SET - VERTICAL STABILIZER in the forward attach-fittings.
(5) Install the 98D55307503001 CENTERING BOLT SET - VERTICAL STABILIZER in the aft attach-fittings.
(6) Install the split sleeves and the attach bolts:
(a) At the forward attach-fittings, install the split sleeves (35) from inboard. At the mid and the aft attach-fittings, install the split sleeves (35) from outboard.
(b) Apply the Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the mid attach-fitting split sleeves (35) and install them.
(d) Install, but do not tighten the nuts (34) and the washers (45) (Ref. AMM TASK 20-22-00-400-001).
(e) Do steps (a) to (c) for the forward and then the aft attach-fittings.
(8) Use the WRENCH - STANDARD and do the steps that follow:
(a) TORQUE the nuts (34) to between 31.5 and 28.5 m.daN (232.30 and 210.18 lbf.ft ).
(b) Loosen the nuts (34) to between 7.35 and 6.65 m.daN (54.20 and 49.04 lbf.ft ).
(c) TORQUE the nuts (34) to between 20 and 18 m.daN (147.49 and 132.74 lbf.ft ).
(9) Connect the transverse load forks:
(a) Connect the transverse load forks (37) to the spar brackets.
(b) Apply the Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the bushes (38), (39) and (44) and install them.
(c) Install the bolts (41).
(d) If necessary, adjust the length of the transverse load forks (37).
(f) Loosen the nuts (46).
(g) Turn the center rod (47) as necessary to get the correct length of the transverse load fork.
(h) Tighten the nuts (46) and TORQUE to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in ).
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(j) Install the washers (43) and the nuts (42).
(k) TORQUE the nuts (42) to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in ).
(l) Safety the nuts (42) with the AIPC 55-31-04-02-190 COTTER PINS (40) and the AIPC 55-31-04-03-190 COTTER PINS (48).
(10) Install the pushrod:
(a) Put the pushrod (49) in position.
(b) Install the bolts (50), washers (51) and (54) and the nuts (52) and (55).
(c) Safety the nuts (52) and (55) with the AIPC 27-21-04-21-120 COTTER PINS (53) or the AIPC 27-21-84-08-010 COTTER PINS (53).
(11) Remove the lift equipment:
(a) Remove the sling from the vertical stabilizer.
(b) Remove the lift lugs.
(c) Install the plastic plugs in the lift points. The plastic plugs must make a smooth surface with the skin.
(d) Install the new self-adhesive disks on the hoisting points (Ref. AMM TASK 11-00-00-400-022).
(12) Connect the Green, Yellow and Blue hydraulic systems (Ref. AMM TASK 20-21-12-911-001):
(a) Remove the blanking plugs from the hydraulic pipes and hoses.
(b) Connect the flexible hoses (25), (26), (27) and (28).
(c) Connect the hydraulic pipes (32) and (33).
(d) Install the top part of the clamp blocks (29), the washers (30) and the nuts (31).
(13) Connect the electrical connections:
(a) Remove the blanking caps and connect electrical connectors 7103 VC-A (8), 7112 VC-A (5), 7135 VC-A (7) and 7148 VC-A (6).
(b) Install the clamps (1), screws (2), washers (3) and the nuts (4).
(c) Remove the blanking caps and connect electrical connectors 7113 VC-A (15) and 7102 VC-A (17).
(d) Put the clamps (10) and the bonding straps (14) in position. Install the screws (12) with the spacers (11) and the washers (13) (Ref. AMM TASK 20-28-00-912-802).
(14) If removed, attach the HF-feedline (16) with the nut (9).
(15) Connect the bonding connections:
(a) Connect the bonding plate (23) with the washers (21) and the screws (22) (Ref. AMM TASK 20-28-00-912-802).
(b) Connect the bonding strap (20) with the washers (19), bolts (24) and the nuts (18) (Ref. AMM TASK 20-28-00-912-802).
Subtask 55-31-11-865-054-A (1) Put the CRANE 1000KG (2200 LB) with the 98A55308440001 SLING-UNIVERSAL,TAILPLANE in position. Attach the cables to the lift lugs.
(2) Remove the support connections and lift the vertical stabilizer clear of the support. Move it to the install position on the aircraft.
(3) Operate the crane and slowly tighten the sling cables and adjust the turnbuckles as necessary to get an equal tension.
(4) Install the 98D55307503001 CENTERING BOLT SET - VERTICAL STABILIZER in the forward attach-fittings.
(5) Install the 98D55307503001 CENTERING BOLT SET - VERTICAL STABILIZER in the aft attach-fittings.
(6) Install the split sleeves and the attach bolts:
(a) At the forward attach-fittings, install the split sleeves (35) from inboard. At the mid and the aft attach-fittings, install the split sleeves (35) from outboard.
(b) Apply the Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the mid attach-fitting split sleeves (35) and install them.
CAUTION:
APPLY AND KEEP A CONTINUOUS PRESSURE WITH YOUR HAND TO THE INBOARD SIDE OF THE SPLIT SLEEVE. THIS MAKES SURE THAT THE SLEEVE STAYS FLUSH AT THE FITTING UNTIL YOU INSTALL AND TORQUE THE TAPERED BOLT AND THE NUT. THIS WILL PREVENT DAMAGE TO THE SPLIT SLEEVE.
(c) Apply the Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the mid attach-fitting bolts (36) and install them. (d) Install, but do not tighten the nuts (34) and the washers (45) (Ref. AMM TASK 20-22-00-400-001).
(e) Do steps (a) to (c) for the forward and then the aft attach-fittings.
NOTE: Only remove one centering bolt at a time and install a split sleeve.
(7) Move the stabilizer until the distance 'X' is more than 0.5 mm (0.0197 in.) at each fitting. (8) Use the WRENCH - STANDARD and do the steps that follow:
(a) TORQUE the nuts (34) to between 31.5 and 28.5 m.daN (232.30 and 210.18 lbf.ft )
. (b) Loosen the nuts (34) to between 7.35 and 6.65 m.daN (54.20 and 49.04 lbf.ft )
. (c) TORQUE the nuts (34) to between 20 and 18 m.daN (147.49 and 132.74 lbf.ft )
. (9) Connect the transverse load forks:
(a) Connect the transverse load forks (37) to the spar brackets.
(b) Apply the Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the bushes (38), (39) and (44) and install them.
(c) Install the bolts (41).
(d) If necessary, adjust the length of the transverse load forks (37).
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.
(e) Remove and discard the lockwire. (f) Loosen the nuts (46).
(g) Turn the center rod (47) as necessary to get the correct length of the transverse load fork.
(h) Tighten the nuts (46) and TORQUE to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in )
. 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.
(i) Safety the nuts (46) with the lockwire (j) Install the washers (43) and the nuts (42).
(k) TORQUE the nuts (42) to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in )
. (l) Safety the nuts (42) with the AIPC 55-31-04-02-190 COTTER PINS (40) and the AIPC 55-31-04-03-190 COTTER PINS (48).
(10) Install the pushrod:
(a) Put the pushrod (49) in position.
(b) Install the bolts (50), washers (51) and (54) and the nuts (52) and (55).
(c) Safety the nuts (52) and (55) with the AIPC 27-21-04-21-120 COTTER PINS (53) or the AIPC 27-21-84-08-010 COTTER PINS (53).
(11) Remove the lift equipment:
(a) Remove the sling from the vertical stabilizer.
(b) Remove the lift lugs.
(c) Install the plastic plugs in the lift points. The plastic plugs must make a smooth surface with the skin.
(d) Install the new self-adhesive disks on the hoisting points (Ref. AMM TASK 11-00-00-400-022).
(12) Connect the Green, Yellow and Blue hydraulic systems (Ref. AMM TASK 20-21-12-911-001):
(a) Remove the blanking plugs from the hydraulic pipes and hoses.
(b) Connect the flexible hoses (25), (26), (27) and (28).
(c) Connect the hydraulic pipes (32) and (33).
(d) Install the top part of the clamp blocks (29), the washers (30) and the nuts (31).
(13) Connect the electrical connections:
(a) Remove the blanking caps and connect electrical connectors 7103 VC-A (8), 7112 VC-A (5), 7135 VC-A (7) and 7148 VC-A (6).
(b) Install the clamps (1), screws (2), washers (3) and the nuts (4).
(c) Remove the blanking caps and connect electrical connectors 7113 VC-A (15) and 7102 VC-A (17).
(d) Put the clamps (10) and the bonding straps (14) in position. Install the screws (12) with the spacers (11) and the washers (13) (Ref. AMM TASK 20-28-00-912-802).
(14) If removed, attach the HF-feedline (16) with the nut (9).
(15) Connect the bonding connections:
(a) Connect the bonding plate (23) with the washers (21) and the screws (22) (Ref. AMM TASK 20-28-00-912-802).
(b) Connect the bonding strap (20) with the washers (19), bolts (24) and the nuts (18) (Ref. AMM TASK 20-28-00-912-802).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 55-31-11-860-051-B | 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 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | B04 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | B03 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HF1 | 1RE1 | HA14 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | H10 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | H09 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 105VU | FLT CTL/SEC1/STBY SPLY | 22CE | B01 |
| 121VU | COM NAV/VOR/2 | 2RS2 | K08 |
| 121VU | AUTO FLT/RUDDER/TRIM/IND | 15CC | M20 |
| 121VU | AUTO FLT/FAC2/28VDC | 5CC2 | M19 |
| 121VU | AUTO FLT/FAC2/26VAC | 14CC2 | M18 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
D. Prepare the Vertical Stabilizer for Test
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the rudder fillet fairing (Ref. AMM TASK 55-43-19-400-001).
(3) Close the access panels 325BL and 325BR (Ref. AMM TASK 55-33-13-410-002).
(4) Remove the WARNING NOTICE(S).
(5) Remove the rigging pins from the rudder cable quadrant and the rudder control unit.
(6) Remove the access platform(s).
Subtask 55-31-11-720-050-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the rudder fillet fairing (Ref. AMM TASK 55-43-19-400-001).
(3) Close the access panels 325BL and 325BR (Ref. AMM TASK 55-33-13-410-002).
(4) Remove the WARNING NOTICE(S).
(5) Remove the rigging pins from the rudder cable quadrant and the rudder control unit.
(6) Remove the access platform(s).
E. Do the Functional Test of the Rudder
(2) If the rudder has been removed, do a functional test of the rudder control surface-position indicator (Ref. AMM TASK 27-25-00-820-001).
(3) Make sure there are no hydraulic leaks from the pipes, hoses and connections.
Subtask 55-31-11-710-051-A 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) Do a functional test of the rudder (Ref. AMM TASK 27-21-00-720-002). (2) If the rudder has been removed, do a functional test of the rudder control surface-position indicator (Ref. AMM TASK 27-25-00-820-001).
(3) Make sure there are no hydraulic leaks from the pipes, hoses and connections.
NOTE: Leaks are not permitted.
F. Operational Test of the Antennas
(1) If applicable, do the operational test of the HF-System (Ref. AMM TASK 23-11-00-710-001).
(2) Do the operational test of the VOR-System (Ref. AMM TASK 34-55-00-710-001).
5. Close-up(1) If applicable, do the operational test of the HF-System (Ref. AMM TASK 23-11-00-710-001).
(2) Do the operational test of the VOR-System (Ref. AMM TASK 34-55-00-710-001).
Subtask 55-31-11-410-050-A
A. Close Access
(1) Install the dorsal fin 321AL (Ref. AMM TASK 53-45-11-400-001).
(2) Install the vertical stabilizer fairings 323AL and 323AR (Ref. AMM TASK 53-55-11-400-001).
(3) Install the rudder fairings 325AL and 325AR (Ref. AMM TASK 53-55-12-400-001).
(4) Close the access door 312AR.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Install the dorsal fin 321AL (Ref. AMM TASK 53-45-11-400-001).
(2) Install the vertical stabilizer fairings 323AL and 323AR (Ref. AMM TASK 53-55-11-400-001).
(3) Install the rudder fairings 325AL and 325AR (Ref. AMM TASK 53-55-12-400-001).
(4) Close the access door 312AR.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.