DOC AIRBUS | AMM A320FInstallation of the Trim Air Valve
TASK 21-63-51-400-001-A
Installation of the Trim Air Valve
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 21-63-51-860-050-A
Subtask 21-63-51-420-050-B
Subtask 21-63-51-410-050-A
[Rev.10 from 2021]
2026.04.02 06:11:44 UTC
Installation of the Trim Air Valve
WARNING:
MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
MAKE SURE THAT THE COMPONENTS OF THE BLEED AIR SYSTEM ARE COOL. HOT COMPONENTS WILL BURN YOU.
CAUTION:
BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.
1. Reason for the Job2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | 1 | WARNING NOTICE(S) |
| FOR [11HK] (TRIM VALVE CKPT) | ||
| No specific | Torque wrench: range to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )  | |
| FOR [12HK] (TRIM VALVE FWD CAB) | ||
| No specific | Torque wrench: range to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ) | |
| FOR [13HK] (TRIM VALVE AFT CAB) | ||
| No specific | Torque wrench: range to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ) | |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191CB, 191DB, 825 |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| FOR [11HK] (TRIM VALVE CKPT) | ||
| 15 | SEAL | AIPC 21-63-03-07-100 |
| 10 | INSULATION | AIPC 21-63-03-07-180 |
| 1 | TIE-CABLE | AIPC 21-63-03-07-190 |
| 15 | SEAL | AIPC 21-63-83-01-340 |
| 1 | TIE-CABLE | AIPC 21-63-83-03-010 |
| 10 | BLANKET-INSULATION | AIPC 21-63-83-03-020 |
| FOR [12HK] (TRIM VALVE FWD CAB) | ||
| 15 | SEAL | AIPC 21-63-03-07-100 |
| 3 | INSULATION | AIPC 21-63-03-07-170 |
| 1 | TIE-CABLE | AIPC 21-63-03-07-190 |
| 15 | SEAL | AIPC 21-63-83-01-340 |
| 1 | TIE-CABLE | AIPC 21-63-83-03-010 |
| 3 | BLANKET-INSULATION | AIPC 21-63-83-03-070 |
| FOR [13HK] (TRIM VALVE AFT CAB) | ||
| 15 | SEAL | AIPC 21-63-03-07-100 |
| 2 | BLANKET-INSULATION | AIPC 21-63-03-07-160 |
| 1 | TIE-CABLE | AIPC 21-63-03-07-190 |
| 15 | SEAL | AIPC 21-63-83-01-340 |
| 1 | TIE-CABLE | AIPC 21-63-83-03-010 |
| 2 | BLANKET-INSULATION | AIPC 21-63-83-03-180 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-33-21-618-001-A-01 | Pre-conditioning through the HP Ground Connection |
| TASK 12-33-21-618-001-A-02 | Pre-conditioning with the APU |
| TASK 21-63-00-710-004-A | Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU |
| 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 25-54-12-400-001-A | Installation of the Forward Cargo-Compartment Partition |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| FOR [11HK] (TRIM VALVE CKPT) | |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| FOR [12HK] (TRIM VALVE FWD CAB) | |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| FOR [13HK] (TRIM VALVE AFT CAB) | |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
Trim Air ValveSubtask 21-63-51-860-050-A
A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized
(Ref. AMM TASK 24-41-00-861-002).
(2) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (the OFF legend is on).
(b) Make sure that the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
(c) Make sure that the PACK 1 and the PACK 2 pushbutton switches are released (the OFF legends are on).
(d) Make sure that the HOT AIR pushbutton switch is released (the OFF legend is on).
(e) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate these pushbutton switches.
(3) At access doors 191CB and 191DB:
(a) On the LP and the HP ground connectors, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to supply the ground air.
(4) Make sure that forward cargo-compartment door 825 is open (Ref. AMM TASK 52-30-00-860-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at forward cargo-compartment door 825.
(6) Make sure that the access panels at partition FR 34 are removed (Ref. AMM TASK 25-54-12-000-001).
Subtask 21-63-51-865-051-A (1) Make sure that the aircraft electrical circuits are energized
(Ref. AMM TASK 24-41-00-861-002).
(2) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (the OFF legend is on).
(b) Make sure that the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
(c) Make sure that the PACK 1 and the PACK 2 pushbutton switches are released (the OFF legends are on).
(d) Make sure that the HOT AIR pushbutton switch is released (the OFF legend is on).
(e) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate these pushbutton switches.
(3) At access doors 191CB and 191DB:
(a) On the LP and the HP ground connectors, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to supply the ground air.
(4) Make sure that forward cargo-compartment door 825 is open (Ref. AMM TASK 52-30-00-860-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at forward cargo-compartment door 825.
(6) Make sure that the access panels at partition FR 34 are removed (Ref. AMM TASK 25-54-12-000-001).
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 | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/ZONE TEMP CTL/28VDC/SYS2 | 4HK | V20 |
| 122VU | AIR COND/ZONE TEMP CTL/28VDC/SYS1 | 3HK | V19 |
| 122VU | AIR COND/ZONE TEMP CTL/115VAC/SYS2 | 2HK | V18 |
| 122VU | AIR COND/ZONE TEMP CTL/115VAC/SYS1 | 1HK | V17 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
Subtask 21-63-51-420-050-B
A. Installation of the Trim Air Valve
(a) Remove the blanking plugs from the duct flange (17), the trim air valve (8) and the duct assembly (11),
(b) Clean the component interfaces and the adjacent area.
(c) Make sure that the parts retained from the removed component are clean and in the correct condition.
(d) Make sure that the seals (15) are in a good condition. If necessary replace the AIPC 21-63-03-07-100 SEAL (15) or AIPC 21-63-83-01-340 SEAL (15).
(e) Put the O-ring (15) in position on the trim air valve (8).
(f) Put the trim air valve (8) in position on the duct flange (17) and install the clamp (14).
(g) Make sure that the trim air valve is in the correct position.
(h) TORQUE the clamp (14) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ).
(j) Move the duct assembly (11) downwards and into position on the trim air valve (8).
(k) Install the clamp (22).
(l) TORQUE the clamp (22) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ).
(m) Put the bonding strap (21) in position and install the washer (20), the screw (19), the washer (13) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(n) Remove the blanking caps from the disconnected electrical connectors.
(o) Make sure that all the electrical connections are clean and in the correct condition.
(p) Connect the electrical connector (9).
(q) Make sure that the work area is clean and clear of tools and other items.
(2) FOR [12HK] (TRIM VALVE FWD CAB)
(a) Remove the blanking plugs from the duct flange (16), the trim air valve (6) and the duct assembly (11),
(b) Clean the component interfaces and the adjacent area.
(c) Make sure that the parts retained from the removed component are clean and in the correct condition.
(d) Make sure that the seals (15) are in a good condition. If necessary replace the AIPC 21-63-03-07-100 SEAL (15) or AIPC 21-63-83-01-340 SEAL (15).
(e) Put the seal (15) in position on the trim air valve (6).
(f) Put the trim air valve (6) in position on the duct flange (16) and install the clamp (14).
(g) Make sure that the trim air valve is in the correct position.
(h) TORQUE the clamp (14) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ).
(j) Move the duct assembly (11) downwards and into position on the trim air valve (6).
(k) Install the clamp (22).
(l) TORQUE the clamp (22) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ).
(m) Put the bonding strap (21) in position and install the washer (20), the screw (19), the washer (13) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(n) Remove the blanking caps from the disconnected electrical connectors.
(o) Make sure that all the electrical connections are clean and in the correct condition.
(p) Connect the electrical connector (7).
(q) Make sure that the work area is clean and clear of tools and other items.
(3) FOR [13HK] (TRIM VALVE AFT CAB)
(a) Remove the blanking plugs from the duct flange (18), the trim air valve (4) and the duct assembly (11),
(b) Clean the component interfaces and the adjacent area.
(c) Make sure that the parts retained from the removed component are clean and in the correct condition.
(d) Make sure that the seals (15) are in a good condition. If necessary replace the AIPC 21-63-03-07-100 SEAL (15) or AIPC 21-63-83-01-340 SEAL (15).
(e) Put seal (15) in position on the trim air valve (4).
(f) Put the trim air valve (4) in position on the duct flange (18) and install the clamp (14).
(g) Make sure that the trim air valve is in the correct position.
(h) TORQUE the clamp (14) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ).
(j) Move the duct assembly (11) downwards and into position on the trim air valve (4).
(k) Install the clamp (22).
(l) TORQUE the clamp (22) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in ).
(m) Put the bonding strap (21) in position and install the washer (20), the screw (19), the washer (13) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(n) Remove the blanking caps from the disconnected electrical connectors.
(o) Make sure that all the electrical connections are clean and in the correct condition.
(p) Connect the electrical connector (5).
(q) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-63-51-865-053-A CAUTION:
DURING INSTALLATION, MAKE SURE THAT THE CLAMP FASTENERS ARE NOT DIRECTLY ABOVE OR BELOW THE VALVE POSITION INDICATOR. THE VALVE POSITION INDICATOR MUST MOVE FREELY. IF IT TOUCHES A CLAMP FASTENER, THE TRIM-AIR VALVE WILL NOT OPERATE CORRECTLY.
(1) FOR [11HK] (TRIM VALVE CKPT)(a) Remove the blanking plugs from the duct flange (17), the trim air valve (8) and the duct assembly (11),
(b) Clean the component interfaces and the adjacent area.
(c) Make sure that the parts retained from the removed component are clean and in the correct condition.
(d) Make sure that the seals (15) are in a good condition. If necessary replace the AIPC 21-63-03-07-100 SEAL (15) or AIPC 21-63-83-01-340 SEAL (15).
(e) Put the O-ring (15) in position on the trim air valve (8).
(f) Put the trim air valve (8) in position on the duct flange (17) and install the clamp (14).
(g) Make sure that the trim air valve is in the correct position.
(h) TORQUE the clamp (14) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )
. NOTE: The electrical actuator of the trim air valve (8) must face in a forward direction.
(i) Put the O-ring (15) in position on the duct assembly (11). (j) Move the duct assembly (11) downwards and into position on the trim air valve (8).
(k) Install the clamp (22).
(l) TORQUE the clamp (22) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )
. (m) Put the bonding strap (21) in position and install the washer (20), the screw (19), the washer (13) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(n) Remove the blanking caps from the disconnected electrical connectors.
(o) Make sure that all the electrical connections are clean and in the correct condition.
(p) Connect the electrical connector (9).
(q) Make sure that the work area is clean and clear of tools and other items.
(2) FOR [12HK] (TRIM VALVE FWD CAB)
(a) Remove the blanking plugs from the duct flange (16), the trim air valve (6) and the duct assembly (11),
(b) Clean the component interfaces and the adjacent area.
(c) Make sure that the parts retained from the removed component are clean and in the correct condition.
(d) Make sure that the seals (15) are in a good condition. If necessary replace the AIPC 21-63-03-07-100 SEAL (15) or AIPC 21-63-83-01-340 SEAL (15).
(e) Put the seal (15) in position on the trim air valve (6).
(f) Put the trim air valve (6) in position on the duct flange (16) and install the clamp (14).
(g) Make sure that the trim air valve is in the correct position.
(h) TORQUE the clamp (14) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )
. NOTE: The electrical actuator of the trim air valve (6) must face in a rearwards direction.
(i) Put the seal (15) in position on the duct assembly (11). (j) Move the duct assembly (11) downwards and into position on the trim air valve (6).
(k) Install the clamp (22).
(l) TORQUE the clamp (22) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )
. (m) Put the bonding strap (21) in position and install the washer (20), the screw (19), the washer (13) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(n) Remove the blanking caps from the disconnected electrical connectors.
(o) Make sure that all the electrical connections are clean and in the correct condition.
(p) Connect the electrical connector (7).
(q) Make sure that the work area is clean and clear of tools and other items.
(3) FOR [13HK] (TRIM VALVE AFT CAB)
(a) Remove the blanking plugs from the duct flange (18), the trim air valve (4) and the duct assembly (11),
(b) Clean the component interfaces and the adjacent area.
(c) Make sure that the parts retained from the removed component are clean and in the correct condition.
(d) Make sure that the seals (15) are in a good condition. If necessary replace the AIPC 21-63-03-07-100 SEAL (15) or AIPC 21-63-83-01-340 SEAL (15).
(e) Put seal (15) in position on the trim air valve (4).
(f) Put the trim air valve (4) in position on the duct flange (18) and install the clamp (14).
(g) Make sure that the trim air valve is in the correct position.
(h) TORQUE the clamp (14) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )
. NOTE: The electrical actuator of the trim air valve (4) must face in a rearwards direction.
(i) Put the seal (15) in position on the duct assembly (11). (j) Move the duct assembly (11) downwards and into position on the trim air valve (4).
(k) Install the clamp (22).
(l) TORQUE the clamp (22) to between 0.546 and 0.491 m.daN (48.32 and 43.45 lbf.in )
. (m) Put the bonding strap (21) in position and install the washer (20), the screw (19), the washer (13) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(n) Remove the blanking caps from the disconnected electrical connectors.
(o) Make sure that all the electrical connections are clean and in the correct condition.
(p) Connect the electrical connector (5).
(q) Make sure that the work area is clean and clear of tools and other items.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-63-51-710-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/ZONE TEMP CTL/28VDC/SYS2 | 4HK | V20 |
| 122VU | AIR COND/ZONE TEMP CTL/28VDC/SYS1 | 3HK | V19 |
| 122VU | AIR COND/ZONE TEMP CTL/115VAC/SYS2 | 2HK | V18 |
| 122VU | AIR COND/ZONE TEMP CTL/115VAC/SYS1 | 1HK | V17 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
C. Test
(1) Do the pre-conditioning through the HP ground connector or with the APU (Ref. AMM TASK 12-33-21-618-001) (Ref. AMM TASK 12-33-21-618-001).
(2) Do a leak check of the trim air valve connections.
(4) Do the operational test of the cockpit and cabin temperature control system (Ref. AMM TASK 21-63-00-710-004)>.
Subtask 21-63-51-420-052-B (1) Do the pre-conditioning through the HP ground connector or with the APU (Ref. AMM TASK 12-33-21-618-001) (Ref. AMM TASK 12-33-21-618-001).
(2) Do a leak check of the trim air valve connections.
NOTE: Leaks are not permitted.
(3) After approx. 15 minutes stop the pre-conditioning (Ref. AMM TASK 12-33-21-618-001) (Ref. AMM TASK 12-33-21-618-001). (4) Do the operational test of the cockpit and cabin temperature control system (Ref. AMM TASK 21-63-00-710-004)>.
D. Installation of the Insulation
(1) FOR [11HK] (TRIM VALVE CKPT)
(a) Make sure that the insulation (10) is in a good condition. If necessary replace the AIPC 21-63-03-07-180 INSULATION (10) or AIPC 21-63-83-03-020 BLANKET-INSULATION (10).
(b) Put the insulation (10) in position and install the new AIPC 21-63-03-07-190 TIE-CABLE (1) or AIPC 21-63-83-03-010 TIE-CABLE (1).
(c) Make sure that the work area is clean and clear of tools and other items.
(2) FOR [12HK] (TRIM VALVE FWD CAB)
(a) Make sure that the insulation (3) is in a good condition. If necessary replace the AIPC 21-63-03-07-170 INSULATION (3) or AIPC 21-63-83-03-070 BLANKET-INSULATION (3).
(b) Put the insulation (3) in position and install the new AIPC 21-63-03-07-190 TIE-CABLE (1) or AIPC 21-63-83-03-010 TIE-CABLE (1).
(c) Make sure that the work area is clean and clear of tools and other items.
(3) FOR [13HK] (TRIM VALVE AFT CAB)
(a) Make sure that the insulation (2) is in a good condition. If necessary replace the AIPC 21-63-03-07-160 BLANKET-INSULATION (2) or AIPC 21-63-83-03-180 BLANKET-INSULATION (2).
(b) Put the insulation (2) in position and install the new AIPC 21-63-03-07-190 TIE-CABLE (1) or AIPC 21-63-83-03-010 TIE-CABLE (1).
(c) Make sure that the work area is clean and clear of tools and other items.
5. Close-up(1) FOR [11HK] (TRIM VALVE CKPT)
(a) Make sure that the insulation (10) is in a good condition. If necessary replace the AIPC 21-63-03-07-180 INSULATION (10) or AIPC 21-63-83-03-020 BLANKET-INSULATION (10).
(b) Put the insulation (10) in position and install the new AIPC 21-63-03-07-190 TIE-CABLE (1) or AIPC 21-63-83-03-010 TIE-CABLE (1).
(c) Make sure that the work area is clean and clear of tools and other items.
(2) FOR [12HK] (TRIM VALVE FWD CAB)
(a) Make sure that the insulation (3) is in a good condition. If necessary replace the AIPC 21-63-03-07-170 INSULATION (3) or AIPC 21-63-83-03-070 BLANKET-INSULATION (3).
(b) Put the insulation (3) in position and install the new AIPC 21-63-03-07-190 TIE-CABLE (1) or AIPC 21-63-83-03-010 TIE-CABLE (1).
(c) Make sure that the work area is clean and clear of tools and other items.
(3) FOR [13HK] (TRIM VALVE AFT CAB)
(a) Make sure that the insulation (2) is in a good condition. If necessary replace the AIPC 21-63-03-07-160 BLANKET-INSULATION (2) or AIPC 21-63-83-03-180 BLANKET-INSULATION (2).
(b) Put the insulation (2) in position and install the new AIPC 21-63-03-07-190 TIE-CABLE (1) or AIPC 21-63-83-03-010 TIE-CABLE (1).
(c) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-63-51-410-050-A
A. Close Access
(1) Install the access panels at partition FR 34 (Ref. AMM TASK 25-54-12-400-001).
(2) Remove the access platform(s).
(3) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
(4) Remove the WARNING NOTICE(S).
Subtask 21-63-51-862-050-A (1) Install the access panels at partition FR 34 (Ref. AMM TASK 25-54-12-400-001).
(2) Remove the access platform(s).
(3) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
(4) Remove the WARNING NOTICE(S).