DOC AIRBUS | AMM A320FInstallation of the Trim-Air Check Valves
TASK 21-63-42-400-001-A
Installation of the Trim-Air Check Valves
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 21-63-42-860-050-A
Subtask 21-63-42-420-050-B
Subtask 21-63-42-410-050-A
[Rev.10 from 2021]
2026.04.02 06:48:32 UTC
Installation of the Trim-Air Check Valves
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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 JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191BB, 191CB, 191DB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 42 | WASHER | AIPC 21-52-03-82-050 |
| 42 | WASHER | AIPC 21-52-83-82-050 |
| FOR [18HM] (P1 CHECK VALVE TRIM AIR) | ||
| 12 | SEAL | AIPC 21-51-03-08-020 |
| 27 | SEAL | AIPC 21-51-03-08-055 |
| 12 | SEAL | AIPC 21-51-83-03-010 |
| 27 | SEAL | AIPC 21-51-83-03-180 |
| 4 | O-RING | AIPC 21-63-03-03-020 |
| 4 | SEAL | AIPC 21-63-83-05-060 |
| FOR [19HM] (P2 CHECK VALVE TRIM AIR) | ||
| 12 | SEAL | AIPC 21-51-03-08-020 |
| 27 | SEAL | AIPC 21-51-03-08-055 |
| 12 | SEAL | AIPC 21-51-83-03-010 |
| 27 | SEAL | AIPC 21-51-83-03-180 |
| 4 | O-RING | AIPC 21-63-03-03-020 |
| 4 | SEAL | AIPC 21-63-83-05-060 |
| 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 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 53-35-13-000-002-A | Removal of the Quick-Release Access Panels from the Belly Fairing Structure |
| TASK 53-35-13-400-002-A | Installation of the Quick-Release Access Panels on the Belly Fairing Structure |
| FOR [18HM] (P1 CHECK VALVE TRIM AIR) | |
| TASK 20-26-00-910-002-A | Installation of Expansion Joints |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 20-28-00-912-803-A | Bonding Surface Preparation |
| FOR [19HM] (P2 CHECK VALVE TRIM AIR) | |
| TASK 20-26-00-910-002-A | Installation of Expansion Joints |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 20-28-00-912-803-A | Bonding Surface Preparation |
Trim-Air Check ValveSubtask 21-63-42-860-050-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 access panel 191BB is removed (Ref. AMM TASK 53-35-13-000-002).
Subtask 21-63-42-865-051-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 access panel 191BB is removed (Ref. AMM TASK 53-35-13-000-002).
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 | |||
| FOR FIN: 18HM (P1 CHECK VALVE TRIM AIR) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 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 1/CHAN B/115VAC | 50HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 19HM (P2 CHECK VALVE TRIM AIR) | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| ** 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 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
Subtask 21-63-42-420-050-B
A. Installation of the Trim-Air Check Valve
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do a visual inspection of the trim-air check-valve flappers to make sure that they are in good condition and that they move easily.
(4) FOR [18HM] (P1 CHECK VALVE TRIM AIR)
(a) Remove the protective covers from the open ends of the ducts (1) and (14), the duct spigot (26) and the sleeve (25).
(b) Loosen the bolts (15).
(c) Prepare the surface of the bonding point(s) (Ref. AMM TASK 20-28-00-912-803).
(d) Put the new AIPC 21-63-03-03-020 O-RING (4) or AIPC 21-63-83-05-060 SEAL (4) and the trim-air check valve (9) in position on the duct (14):
1 Make sure that the flaps open in the direction of the airflow and the pin (11) is in its location in the duct flange.
(e) Put the new AIPC 21-51-03-08-020 SEAL (12) or AIPC 21-51-83-03-010 SEAL (12) in position on the flange of the duct (1).
(f) Put the new AIPC 21-51-03-08-055 SEAL (27) or AIPC 21-51-83-03-180 SEAL (27) in position in the sleeve (25) (Ref. AMM TASK 20-26-00-910-002).
(g) Carefully put the duct spigot (26) in position in the sleeve (25):
1 Turn the sleeve (25) when you put the duct spigot (26) in position to prevent damage to the seals (27) in the sleeve (25).
(h) Carefully put the duct (1) in position on the duct (14):
1 Make sure that you do not move the packings (4) and (12) and the trim-air check valve (9) when you put the duct (1) in its position.
(i) Install the bolts (10), the washers (8) and the nuts (7).
(j) Tighten the bolts (10).
(k) Put the bonding strap (3) in position and install the bolt (13), the washer (5) and the nut (6).
(l) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(m) Tighten the bolt (13).
(n) Tighten the bolts (15).
(o) Put the support rods (28) and (30) in position in the clevis (33) and install the bolts (29), the washers (31) and the nuts (32).
(p) Tighten the bolts (29).
(q) Put the bonding strap (22) in position and install the bolt (23), the washer (21) and the nut (20).
(r) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(s) Tighten the bolts (23).
(5) FOR [19HM] (P2 CHECK VALVE TRIM AIR)
(a) Remove the protective covers from the open ends of the ducts (2) and (14), the duct spigot (26) and the sleeve (25).
(b) Loosen the bolts (15).
(c) Prepare the surface of the bonding point(s) (Ref. AMM TASK 20-28-00-912-803).
(d) Put the new AIPC 21-63-03-03-020 O-RING (4) or AIPC 21-63-83-05-060 SEAL (4) and the trim-air check valve (9) in position on the duct (14):
1 Make sure that the flaps open in the direction of the airflow and the pin (11) is in its location in the duct flange.
(e) Put the new AIPC 21-51-03-08-020 SEAL (12) or AIPC 21-51-83-03-010 SEAL (12) in position on the flange of the duct (2).
(f) Put the new AIPC 21-51-03-08-055 SEAL (27) or AIPC 21-51-83-03-180 SEAL (27) in position in the sleeve (25) (Ref. AMM TASK 20-26-00-910-002).
(g) Carefully put the duct spigot (26) in position in the sleeve (25):
1 Turn the sleeve (25) when you put the duct spigot (26) in position to prevent damage to the seals (27) in the sleeve (25).
(h) Carefully put the duct (2) in position on the duct (14):
1 Make sure that you do not move the packings (4) and (12) and the trim-air check valve (9) when you put the duct (2) in its position.
(i) Install the bolts (10), the washers (8) and the nuts (7).
(j) Tighten the bolts (10).
(k) Put the bonding strap (3) in position and install the bolt (13), the washer (5) and the nut (6).
(l) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(m) Tighten the bolt (13).
(n) Tighten the bolts (15).
(o) Put the support rods (28) and (30) in position in the clevis (33) and install the bolts (29), the washers (31) and the nuts (32).
(p) Tighten the bolts (29).
(q) Put the bonding strap (22) in position and install the bolt (23), the washer (21) and the nut (20).
(r) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(s) Tighten the bolt (23).
Subtask 21-63-42-820-050-A (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do a visual inspection of the trim-air check-valve flappers to make sure that they are in good condition and that they move easily.
(4) FOR [18HM] (P1 CHECK VALVE TRIM AIR)
(a) Remove the protective covers from the open ends of the ducts (1) and (14), the duct spigot (26) and the sleeve (25).
(b) Loosen the bolts (15).
(c) Prepare the surface of the bonding point(s) (Ref. AMM TASK 20-28-00-912-803).
(d) Put the new AIPC 21-63-03-03-020 O-RING (4) or AIPC 21-63-83-05-060 SEAL (4) and the trim-air check valve (9) in position on the duct (14):
1 Make sure that the flaps open in the direction of the airflow and the pin (11) is in its location in the duct flange.
(e) Put the new AIPC 21-51-03-08-020 SEAL (12) or AIPC 21-51-83-03-010 SEAL (12) in position on the flange of the duct (1).
(f) Put the new AIPC 21-51-03-08-055 SEAL (27) or AIPC 21-51-83-03-180 SEAL (27) in position in the sleeve (25) (Ref. AMM TASK 20-26-00-910-002).
(g) Carefully put the duct spigot (26) in position in the sleeve (25):
1 Turn the sleeve (25) when you put the duct spigot (26) in position to prevent damage to the seals (27) in the sleeve (25).
(h) Carefully put the duct (1) in position on the duct (14):
1 Make sure that you do not move the packings (4) and (12) and the trim-air check valve (9) when you put the duct (1) in its position.
(i) Install the bolts (10), the washers (8) and the nuts (7).
(j) Tighten the bolts (10).
(k) Put the bonding strap (3) in position and install the bolt (13), the washer (5) and the nut (6).
(l) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(m) Tighten the bolt (13).
(n) Tighten the bolts (15).
(o) Put the support rods (28) and (30) in position in the clevis (33) and install the bolts (29), the washers (31) and the nuts (32).
(p) Tighten the bolts (29).
(q) Put the bonding strap (22) in position and install the bolt (23), the washer (21) and the nut (20).
(r) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(s) Tighten the bolts (23).
(5) FOR [19HM] (P2 CHECK VALVE TRIM AIR)
(a) Remove the protective covers from the open ends of the ducts (2) and (14), the duct spigot (26) and the sleeve (25).
(b) Loosen the bolts (15).
(c) Prepare the surface of the bonding point(s) (Ref. AMM TASK 20-28-00-912-803).
(d) Put the new AIPC 21-63-03-03-020 O-RING (4) or AIPC 21-63-83-05-060 SEAL (4) and the trim-air check valve (9) in position on the duct (14):
1 Make sure that the flaps open in the direction of the airflow and the pin (11) is in its location in the duct flange.
(e) Put the new AIPC 21-51-03-08-020 SEAL (12) or AIPC 21-51-83-03-010 SEAL (12) in position on the flange of the duct (2).
(f) Put the new AIPC 21-51-03-08-055 SEAL (27) or AIPC 21-51-83-03-180 SEAL (27) in position in the sleeve (25) (Ref. AMM TASK 20-26-00-910-002).
(g) Carefully put the duct spigot (26) in position in the sleeve (25):
1 Turn the sleeve (25) when you put the duct spigot (26) in position to prevent damage to the seals (27) in the sleeve (25).
(h) Carefully put the duct (2) in position on the duct (14):
1 Make sure that you do not move the packings (4) and (12) and the trim-air check valve (9) when you put the duct (2) in its position.
(i) Install the bolts (10), the washers (8) and the nuts (7).
(j) Tighten the bolts (10).
(k) Put the bonding strap (3) in position and install the bolt (13), the washer (5) and the nut (6).
(l) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(m) Tighten the bolt (13).
(n) Tighten the bolts (15).
(o) Put the support rods (28) and (30) in position in the clevis (33) and install the bolts (29), the washers (31) and the nuts (32).
(p) Tighten the bolts (29).
(q) Put the bonding strap (22) in position and install the bolt (23), the washer (21) and the nut (20).
(r) Do the electrical resistance measurement and the final protection of the bonding point(s) (Ref. AMM TASK 20-28-00-912-802).
(s) Tighten the bolt (23).
B. Measurement and Adjustment
(1) At the sleeve (25):
(a) Move the sleeve (25) until the dimensions Y are equal.
(c) The difference between the smallest and the largest of the measured dimension Y must not be more than 1.2 mm (0.0472 in.).
(2) To adjust the support rods you must:
(a) For the support rod (28),
1 Remove the nuts (43) and (53), the washers (44) and (54) and the bolts (46) and (62).
2 Remove the support rod (60).
3 Remove the nut (55), the washer (56) and the bolt (40).
4 Move the support rod (28) away from the mounting bracket (57).
5 Bend back the lock tabs on the washer (42) and loosen the nut (48).
6 Remove the rod eye-end (41) and remove and discard the washer (42).
7 Put a new AIPC 21-52-03-82-050 WASHER (42) or AIPC 21-52-83-82-050 WASHER (42) in position on the rod eye-end (41) and install the rod eye-end in the support rod (28).
8 Turn the rod eye-end (41) to get the necessary adjustment.
9 Put the support rod (28) in position in the bracket (57) and install the bolt (40), the washer (56) and the nut (55).
10 Hold the rod eye-end (41) and tighten the nut (48).
12 If necessary do the adjustment of the support rod (60) as in sub-paragraph (b).
13 Put the support rod (60) in position and install the bolts (46) and (62), the washers (44) and (54) and the nuts (43) and (53).
(b) For the support rod (60):
2 Loosen the nuts (58).
3 Turn the fork ends (45) and (61) to get the necessary adjustment.
4 Make sure that the forks of the fork ends (45) and (61) are aligned with each other and tighten the nuts (58).
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(c) For the support rod (30):
1 Remove the nuts (43) and (52), the washers (44) and (51) and the bolts (46) and (50).
2 Temporarily attach the support rod (60) to the aircraft structure.
3 Move the support rod (30) away from the clevis (33).
4 Bend back the lock tabs of the washer (42) and loosen the nut (48).
5 Remove the rod eye-end (49) and remove and discard the washer (42).
6 Put a new AIPC 21-52-03-82-050 WASHER (42) or AIPC 21-52-83-82-050 WASHER (42) in position on the rod eye-end (49) and install the rod eye-end (49) in the support rod (30).
7 Turn the rod eye-end (49) to get the necessary adjustment.
8 Put the support rod (30) in position in the clevis (33) and install the bolt (50), the washer (51) and the nut (52).
9 Hold the rod eye-end (49) and tighten the nut (48).
11 Remove the temporary attachment and put the fork end (45) in position on the support rod (30).
12 Install the bolt (46), the washer (44) and the nut (43).
Subtask 21-63-42-420-054-A (1) At the sleeve (25):
(a) Move the sleeve (25) until the dimensions Y are equal.
NOTE: Turn the sleeve (25) when you move it.
This will help to prevent damage to the seals in the sleeve.
The dimensions Y should be approximately 4 mm (0.1575 in.).
(b) Measure the dimension Y around the circumference of the sleeve (25). This will help to prevent damage to the seals in the sleeve.
The dimensions Y should be approximately 4 mm (0.1575 in.).
(c) The difference between the smallest and the largest of the measured dimension Y must not be more than 1.2 mm (0.0472 in.).
NOTE: To get this tolerance you must adjust the support rods (28) and (30), and if necessary the support rod (60).
(d) If adjustment is not necessary then carry on with the Final Installation. (2) To adjust the support rods you must:
(a) For the support rod (28),
1 Remove the nuts (43) and (53), the washers (44) and (54) and the bolts (46) and (62).
2 Remove the support rod (60).
3 Remove the nut (55), the washer (56) and the bolt (40).
4 Move the support rod (28) away from the mounting bracket (57).
5 Bend back the lock tabs on the washer (42) and loosen the nut (48).
6 Remove the rod eye-end (41) and remove and discard the washer (42).
7 Put a new AIPC 21-52-03-82-050 WASHER (42) or AIPC 21-52-83-82-050 WASHER (42) in position on the rod eye-end (41) and install the rod eye-end in the support rod (28).
8 Turn the rod eye-end (41) to get the necessary adjustment.
9 Put the support rod (28) in position in the bracket (57) and install the bolt (40), the washer (56) and the nut (55).
10 Hold the rod eye-end (41) and tighten the nut (48).
NOTE: Make sure that there are sufficient threads of the rod eye-end (41) engaged in the support rod (28).
To do this you must put a suitable piece of wire in the inspection hole (47) in the support rod (28).
The wire should not go fully through the support rod (28).
11 Bend back the lock tabs on the washer (42) to safety the nut (48). To do this you must put a suitable piece of wire in the inspection hole (47) in the support rod (28).
The wire should not go fully through the support rod (28).
12 If necessary do the adjustment of the support rod (60) as in sub-paragraph (b).
13 Put the support rod (60) in position and install the bolts (46) and (62), the washers (44) and (54) and the nuts (43) and (53).
(b) For the support rod (60):
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 Remove and discard the lockwire from the locking devices (59) and the nuts (58). 2 Loosen the nuts (58).
3 Turn the fork ends (45) and (61) to get the necessary adjustment.
4 Make sure that the forks of the fork ends (45) and (61) are aligned with each other and tighten the nuts (58).
NOTE: You must adjust both fork ends by an equal amount.
Make sure that there are sufficient threads of the fork ends (45) and (61) engaged in the support rod (60).
To do this you must put a suitable piece of wire in the inspection hole (47) in the support rod (60).
The wire should not go fully through the support rod (60).
5 Safety the nuts (58) to the locking devices (59) with Make sure that there are sufficient threads of the fork ends (45) and (61) engaged in the support rod (60).
To do this you must put a suitable piece of wire in the inspection hole (47) in the support rod (60).
The wire should not go fully through the support rod (60).
(c) For the support rod (30):
1 Remove the nuts (43) and (52), the washers (44) and (51) and the bolts (46) and (50).
2 Temporarily attach the support rod (60) to the aircraft structure.
3 Move the support rod (30) away from the clevis (33).
4 Bend back the lock tabs of the washer (42) and loosen the nut (48).
5 Remove the rod eye-end (49) and remove and discard the washer (42).
6 Put a new AIPC 21-52-03-82-050 WASHER (42) or AIPC 21-52-83-82-050 WASHER (42) in position on the rod eye-end (49) and install the rod eye-end (49) in the support rod (30).
7 Turn the rod eye-end (49) to get the necessary adjustment.
8 Put the support rod (30) in position in the clevis (33) and install the bolt (50), the washer (51) and the nut (52).
9 Hold the rod eye-end (49) and tighten the nut (48).
NOTE: Make sure that there are sufficient threads of the rod eye-end (49) engaged in the support rod (30).
To do this you must put a suitable piece of wire in the inspection hole (47) in the support rod (30).
The wire should not go fully through the support rod (30).
10 Bend back the lock tabs on the washer (42) to safety the nut (48). To do this you must put a suitable piece of wire in the inspection hole (47) in the support rod (30).
The wire should not go fully through the support rod (30).
11 Remove the temporary attachment and put the fork end (45) in position on the support rod (30).
12 Install the bolt (46), the washer (44) and the nut (43).
C. Final Installation
(1) Make sure that dimension Y at the sleeve (25) is in tolerance.
(2) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-63-42-420-053-A (1) Make sure that dimension Y at the sleeve (25) is in tolerance.
(2) Make sure that the work area is clean and clear of tools and other items.
DELETED
Subtask 21-63-42-865-053-A E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-63-42-710-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 18HM (P1 CHECK VALVE TRIM AIR) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 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 1/CHAN B/115VAC | 50HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 19HM (P2 CHECK VALVE TRIM AIR) | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| ** 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 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
F. Test
(1) Do the pre-conditioning through the APU (Ref. AMM TASK 12-33-21-618-001) or the HP ground connector (Ref. AMM TASK 12-33-21-618-001).
(2) In the air pack compartment do a leak check of the trim-air check valve connections.
5. Close-up(1) Do the pre-conditioning through the APU (Ref. AMM TASK 12-33-21-618-001) or the HP ground connector (Ref. AMM TASK 12-33-21-618-001).
(2) In the air pack compartment do a leak check of the trim-air check valve connections.
NOTE: Leaks are not permitted.
(3) After approx. 15 minutes stop the pre-conditioning (Ref. AMM TASK 12-33-21-618-001) or (Ref. AMM TASK 12-33-21-618-001). Subtask 21-63-42-410-050-A
A. Close Access
(1) Close access panel 191BB (Ref. AMM TASK 53-35-13-400-002).
(2) Remove the WARNING NOTICE(S).
Subtask 21-63-42-862-050-A (1) Close access panel 191BB (Ref. AMM TASK 53-35-13-400-002).
(2) Remove the WARNING NOTICE(S).