DOC AIRBUS | AMM A320FAdjustment of the THS Zero Position
TASK 27-41-00-820-001-A
Adjustment of the THS Zero Position
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 27-41-00-860-056-A
Subtask 27-41-00-220-056-A
Subtask 27-41-00-080-050-A
[Rev.10 from 2021]
2026.03.31 23:50:40 UTC
Adjustment of the THS Zero Position
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 FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
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:
MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobNOTE: This task can contribute to fuel savings.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | 1 | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| 0U190360 | 1 | PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER |
| 98D27403500000 | 1 | PITCH TRIM CONTROL LOCKING |
| 98D27407532000 | 1 | RIGGING PIN - THS MECHANICAL CONTROL |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14QFC1) | Wire-Locking Dia: 0.8 mm CRES - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 120 | AVIONICS COMPARTMENT |
| 130 | FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX |
| 140 | CENTER WING |
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 240 | MID PASSENGER COMPARTMENT |
| 310 | FUSLG TAIL SECTION AFT OF AFT PRESS BHD |
| 312AR, 811 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-21-41-000-001-A | Removal of the Recirculation Filter Cartridge |
| TASK 21-21-41-400-001-A | Installation of the Recirculation Filter Cartridge |
| TASK 21-21-45-000-001-A | Removal of the Recirculation Filter Housing |
| TASK 21-21-45-400-001-A | Installation of the Recirculation Filter Housing |
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 25-54-12-000-001-A | Removal of the Forward Cargo-Compartment Partition |
| TASK 25-54-12-000-002-A | Removal of the Ceiling Panels in the Forward Cargo Compartment |
| TASK 25-54-12-400-001-A | Installation of the Forward Cargo-Compartment Partition |
| TASK 25-54-12-400-002-A | Installation of the Ceiling Panels in the Forward Cargo Compartment |
| TASK 27-00-00-480-001-A | Installation of the Pitch-Trim Control Locking Tool (98D27403500000) |
| TASK 27-41-00-220-003-A | Check of the Zero Adjustment of the THS |
| TASK 27-41-00-820-002-A | Adjustment of the THS Control-Cables Length |
| TASK 27-44-00-710-003-A | Operational Test of the Trimmable Horizontal Stabilizer Actuator with both (Green and Yellow) and Individual Hydraulic Systems |
| TASK 29-23-00-863-001-A | Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump |
| TASK 29-23-00-864-001-A | Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 53-32-12-000-002-A | Removal of the Cabin Floor Panels |
| TASK 53-32-12-400-002-A | Installation of the Cabin Floor Panels |
| TASK 06-41-53-00 | FUSELAGE-DESCRIPTION AND OPERATION |
Component LocationSubtask 27-41-00-860-056-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the Electronic Instrument System (EIS) start procedure (Ref. AMM TASK 31-60-00-860-001).
(3) Pressurize the Yellow and the Green hydraulic systems (Ref. AMM TASK 29-23-00-863-001).
(4) On the center pedestal, set the pitch-trim control wheel to the zero position.
(5) Lock the pitch-trim control wheel with the 98D27403500000 PITCH TRIM CONTROL LOCKING to prevent movement of the Trimmable Horizontal Stabilizer (THS) (Ref. AMM TASK 27-00-00-480-001).
(6) Depressurize the Yellow and the Green hydraulic systems (Ref. AMM TASK 29-23-00-864-001).
Subtask 27-41-00-941-051-A (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the Electronic Instrument System (EIS) start procedure (Ref. AMM TASK 31-60-00-860-001).
(3) Pressurize the Yellow and the Green hydraulic systems (Ref. AMM TASK 29-23-00-863-001).
(4) On the center pedestal, set the pitch-trim control wheel to the zero position.
(5) Lock the pitch-trim control wheel with the 98D27403500000 PITCH TRIM CONTROL LOCKING to prevent movement of the Trimmable Horizontal Stabilizer (THS) (Ref. AMM TASK 27-00-00-480-001).
(6) Depressurize the Yellow and the Green hydraulic systems (Ref. AMM TASK 29-23-00-864-001).
B. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow and the Green hydraulic systems:
(a) Put the WARNING NOTICE(S) in position to tell persons not to supply the ground air.
(3) In the cockpit, on the center pedestal, put the WARNING NOTICE(S) to tell persons not to operate the pitch controls.
(4) Make sure that the THS graduation agrees with the zero on the fuselage.
Subtask 27-41-00-010-054-A ** ON A/C NOT FOR ALL (1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow and the Green hydraulic systems:
- on the overhead panel, on the HYD section of HYD/FUEL panel 40VU
- on the ground service panel of the Green and Yellow hydraulic systems.
(a) Put the WARNING NOTICE(S) in position to tell persons not to supply the ground air.
(3) In the cockpit, on the center pedestal, put the WARNING NOTICE(S) to tell persons not to operate the pitch controls.
(4) Make sure that the THS graduation agrees with the zero on the fuselage.
C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below access door 312AR.
(2) Open access door 312AR.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below access door 811.
(4) Open access door 811.
(5) Get access to the turnbuckles of the THS actuator cables.
(a) In zone 241, remove the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-000-002) and (Ref. AMM D/O 06-41-53-00).
Subtask 27-41-00-010-054-B ** ON A/C NOT FOR ALL (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below access door 312AR.
(2) Open access door 312AR.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below access door 811.
(4) Open access door 811.
(5) Get access to the turnbuckles of the THS actuator cables.
(a) In zone 241, remove the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-000-002) and (Ref. AMM D/O 06-41-53-00).
C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below access door 312AR.
(2) Open access door 312AR.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below access door 811.
(4) Open access door 811.
(5) Get access to the turnbuckles of the THS actuator cables.
(a) Refer to the aircraft configuration during the maintenance phase, there are two possibilities to get access to the turnbuckles of the THS actuator cables. You can use the more applicable procedure that follows:
1 In zones 231 and 241, remove the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-000-002) and (Ref. AMM D/O 06-41-53-00), or
2 In zone 131, in the forward cargo compartment:
a If the Additional Center Tank (ACT) No.4.1 (ACT FWD) is installed, remove it (Ref. AMM D/O 28-11-27-00).
b Remove the applicable ceiling panel between FR35.2 and FR35.5 (Ref. AMM TASK 25-54-12-000-002) and (Ref. AMM D/O 06-41-53-00).
c Remove the applicable partition panels at FR35.5 (Ref. AMM TASK 25-54-12-000-001) and (Ref. AMM D/O 06-41-53-00).
d Remove the recirculation filter cartridge, LH side (Ref. AMM TASK 21-21-41-000-001).
e Remove the recirculation filter housing, LH side (Ref. AMM TASK 21-21-45-000-001).
Subtask 27-41-00-480-050-A (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below access door 312AR.
(2) Open access door 312AR.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below access door 811.
(4) Open access door 811.
(5) Get access to the turnbuckles of the THS actuator cables.
(a) Refer to the aircraft configuration during the maintenance phase, there are two possibilities to get access to the turnbuckles of the THS actuator cables. You can use the more applicable procedure that follows:
1 In zones 231 and 241, remove the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-000-002) and (Ref. AMM D/O 06-41-53-00), or
2 In zone 131, in the forward cargo compartment:
a If the Additional Center Tank (ACT) No.4.1 (ACT FWD) is installed, remove it (Ref. AMM D/O 28-11-27-00).
b Remove the applicable ceiling panel between FR35.2 and FR35.5 (Ref. AMM TASK 25-54-12-000-002) and (Ref. AMM D/O 06-41-53-00).
c Remove the applicable partition panels at FR35.5 (Ref. AMM TASK 25-54-12-000-001) and (Ref. AMM D/O 06-41-53-00).
d Remove the recirculation filter cartridge, LH side (Ref. AMM TASK 21-21-41-000-001).
e Remove the recirculation filter housing, LH side (Ref. AMM TASK 21-21-45-000-001).
D. Put the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (10) in the mechanical input of the THS actuator (12).
Subtask 27-41-00-020-052-A E. Removal of the Protective Covers of the THS-Actuator Mechanical-Input Linkage
(1) Remove the screws (4) and the washers (3).
(2) Release the fasteners (8) and remove the protective covers (1) and (2).
4. Procedure(1) Remove the screws (4) and the washers (3).
(2) Release the fasteners (8) and remove the protective covers (1) and (2).
Subtask 27-41-00-220-056-A
A. Check of the Length of the THS-Actuator Mechanical-Output/Input Chains
(1) At frame 72, for the THS-actuator mechanical-input linkage, make sure that the length of the LH chain is 33.6 links +1.15/-0.26 links (320.7 +11 mm or -2.5 mm (12.6260 +0.4331 in. or -0.0984 in.)) tangential from the center of the sprocket (9).
(2) In the avionic bay, at frame 12, for the pitch-trim wheels output-linkage, make sure that the length of the lower chain is 33.5 links +/-1 links (319.09 -9.525 mm or +9.525 mm (12.563 -0.375 in. or +0.375 in.)) tangential from the center of the sprocket (3).
Subtask 27-41-00-820-057-A (1) At frame 72, for the THS-actuator mechanical-input linkage, make sure that the length of the LH chain is 33.6 links +1.15/-0.26 links (320.7 +11 mm or -2.5 mm (12.6260 +0.4331 in. or -0.0984 in.)) tangential from the center of the sprocket (9).
(2) In the avionic bay, at frame 12, for the pitch-trim wheels output-linkage, make sure that the length of the lower chain is 33.5 links +/-1 links (319.09 -9.525 mm or +9.525 mm (12.563 -0.375 in. or +0.375 in.)) tangential from the center of the sprocket (3).
B. If the length of the chain(s) that you measured is (are) not correct, do the steps that follow:
(1) At frame 72, put the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) in the rocker assembly of the cable tension regulator (13).
(2) Remove the locking clips and release the turnbuckles of the THS control cables until the chains are free of movement.
(3) At frame 72, for the THS-actuator mechanical-input linkage, if the length of the chain is not correct, do the steps that follow:
(a) Remove the screws (6) and disconnect the chain guard (5) from its sprocket (9) and from the chain-guard base plate (7).
(b) Keep the screws (6) and the chain guard (5).
(c) Remove and engage again the chain on the sprocket (9).
1 Make sure that the length of the LH chain is 33.6 links +1.15/-0.26 links 320.7 -2.5 mm or +11.0 mm (12.626 -0.098 in. or +0.433 in.) tangential from the center of the sprocket (9).
(d) Hold the chain in this position.
(e) Put the chain guard (5) in position on the chain-guard base plate (7).
(f) Install and tighten the screws (6).
(4) In the avionic bay, at frame 12, for the pitch-trim wheels-sprocket output, if the length of the lower chain is not correct, do the steps that follow:
(a) Removal of the lockwire:
(b) Remove the screws (5) and the chain guard (1) from the chain-guard base plate (2).
(c) Remove and engage again the chain on the sprocket (3).
1 Make sure that the length of the lower chain is 33.5 links +/-1 links 319.09 -9.525 mm or +9.525 mm (12.563 -0.375 in. or +0.375 in.) tangential from the center of the sprocket (3).
(d) Hold the chain in this position.
(e) Put the chain guard (1) in position on the chain-guard base plate (2).
(f) Install and tighten the screws (5).
(g) Installation of the lockwire:
14QFC1 Wire-Locking Dia: 0.8 mm CRES -
(5) Remove the 98D27403500000 PITCH TRIM CONTROL LOCKING.
(6) Make sure that the pitch-trim control wheels are set to zero.
(7) Adjust the tension of the cables through the turnbuckles in order to have:
Subtask 27-41-00-820-050-A (1) At frame 72, put the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) in the rocker assembly of the cable tension regulator (13).
(2) Remove the locking clips and release the turnbuckles of the THS control cables until the chains are free of movement.
(3) At frame 72, for the THS-actuator mechanical-input linkage, if the length of the chain is not correct, do the steps that follow:
(a) Remove the screws (6) and disconnect the chain guard (5) from its sprocket (9) and from the chain-guard base plate (7).
(b) Keep the screws (6) and the chain guard (5).
(c) Remove and engage again the chain on the sprocket (9).
1 Make sure that the length of the LH chain is 33.6 links +1.15/-0.26 links 320.7 -2.5 mm or +11.0 mm (12.626 -0.098 in. or +0.433 in.) tangential from the center of the sprocket (9).
(d) Hold the chain in this position.
(e) Put the chain guard (5) in position on the chain-guard base plate (7).
(f) Install and tighten the screws (6).
(4) In the avionic bay, at frame 12, for the pitch-trim wheels-sprocket output, if the length of the lower chain is not correct, do the steps that follow:
(a) Removal of the 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 Cut and discard the lockwire (4). (b) Remove the screws (5) and the chain guard (1) from the chain-guard base plate (2).
(c) Remove and engage again the chain on the sprocket (3).
1 Make sure that the length of the lower chain is 33.5 links +/-1 links 319.09 -9.525 mm or +9.525 mm (12.563 -0.375 in. or +0.375 in.) tangential from the center of the sprocket (3).
(d) Hold the chain in this position.
(e) Put the chain guard (1) in position on the chain-guard base plate (2).
(f) Install and tighten the screws (5).
(g) Installation of the 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 (5) with the (5) Remove the 98D27403500000 PITCH TRIM CONTROL LOCKING.
(6) Make sure that the pitch-trim control wheels are set to zero.
(7) Adjust the tension of the cables through the turnbuckles in order to have:
- The pitch-trim control wheel to the zero position (Check that "0" reference mark on each indicator is perpendicular to the point of the triangle of the label fixed to the pedestal).
- The free removal/installation of the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (10) in the mechanical input of the THS actuator (12).
- The free removal/installation of the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) in the rocker assembly of the cable tension regulator (13).
DELETED
Subtask 27-41-00-820-050-B DELETED
Subtask 27-41-00-220-057-A DELETED
Subtask 27-41-00-820-051-A DELETED
Subtask 27-41-00-820-051-B DELETED
Subtask 27-41-00-710-050-A F. Test(s)
(1) Do the operational test of the THS actuator (Ref. AMM TASK 27-44-00-710-003).
(a) During the test, make sure that the travels of the THS actuator cables are free of movement and contact from the adjacent structure.
(2) Make sure that the zero position adjustment of the THS is correct (Ref. AMM TASK 27-41-00-220-003).
5. Close-up(1) Do the operational test of the THS actuator (Ref. AMM TASK 27-44-00-710-003).
(a) During the test, make sure that the travels of the THS actuator cables are free of movement and contact from the adjacent structure.
(2) Make sure that the zero position adjustment of the THS is correct (Ref. AMM TASK 27-41-00-220-003).
Subtask 27-41-00-080-050-A
A. Removal of the Rigging Pins
(1) Make sure that you remove the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (10) from the mechanical input of the THS actuator (12).
(2) Make sure that you remove the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) in the rocker assembly of the cable tension regulator (13).
Subtask 27-41-00-410-056-A (1) Make sure that you remove the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (10) from the mechanical input of the THS actuator (12).
(2) Make sure that you remove the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) in the rocker assembly of the cable tension regulator (13).
B. Installation of the Protective Covers of the THS-Actuator Mechanical-Input Linkage
(1) Install the protective covers (1) and (2).
(2) Tighten the fasteners (8).
(3) Install the washers (3) and the screws (4).
(4) Tighten the screws (4).
Subtask 27-41-00-410-063-A ** ON A/C NOT FOR ALL (1) Install the protective covers (1) and (2).
(2) Tighten the fasteners (8).
(3) Install the washers (3) and the screws (4).
(4) Tighten the screws (4).
C. Close Access
(1) In zone 241, install the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-400-002) and (Ref. AMM D/O 06-41-53-00).
(2) Close access doors 811 and 312AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 27-41-00-410-063-B ** ON A/C NOT FOR ALL (1) In zone 241, install the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-400-002) and (Ref. AMM D/O 06-41-53-00).
(2) Close access doors 811 and 312AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
C. Close Access
(1) Refer to the aircraft configuration during the maintenance phase. There are two possibilities to close access to the turnbuckles of the THS actuator cables. You can use the more applicable procedure that follow:
(a) In zones 231 and 241, install the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-400-002) and (Ref. AMM D/O 06-41-53-00), or
(b) In zone 131, in the forward cargo compartment:
1 Install the recirculation filter housing, LH side (Ref. AMM TASK 21-21-45-400-001).
2 Install the recirculation filter cartridge, LH side (Ref. AMM TASK 21-21-41-400-001).
3 Install the applicable partition panels at FR35.5 (Ref. AMM TASK 25-54-12-400-001) and (Ref. AMM D/O 06-41-53-00).
4 Install the applicable ceiling panel between FR35.2 and FR35.5 (Ref. AMM TASK 25-54-12-400-002) and (Ref. AMM D/O 06-41-53-00).
5 If the ACT No.4.1 (ACT FWD) was removed, install it (Ref. AMM D/O 28-11-27-40).
(2) Close access doors 811 and 312AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 27-41-00-942-055-A (1) Refer to the aircraft configuration during the maintenance phase. There are two possibilities to close access to the turnbuckles of the THS actuator cables. You can use the more applicable procedure that follow:
(a) In zones 231 and 241, install the applicable cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-400-002) and (Ref. AMM D/O 06-41-53-00), or
(b) In zone 131, in the forward cargo compartment:
1 Install the recirculation filter housing, LH side (Ref. AMM TASK 21-21-45-400-001).
2 Install the recirculation filter cartridge, LH side (Ref. AMM TASK 21-21-41-400-001).
3 Install the applicable partition panels at FR35.5 (Ref. AMM TASK 25-54-12-400-001) and (Ref. AMM D/O 06-41-53-00).
4 Install the applicable ceiling panel between FR35.2 and FR35.5 (Ref. AMM TASK 25-54-12-400-002) and (Ref. AMM D/O 06-41-53-00).
5 If the ACT No.4.1 (ACT FWD) was removed, install it (Ref. AMM D/O 28-11-27-40).
(2) Close access doors 811 and 312AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
D. Put the aircraft back to the serviceable condition.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 27-41-00-410-053-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
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Subtask 27-41-00-410-053-B DELETED
Subtask 27-41-00-862-053-A DELETED