DOC AIRBUS | AMM A320FInstallation of the Lower Supply Pipe of the Right Latch [CFMB]
TASK 78-31-49-400-044-A
Installation of the Lower Supply Pipe of the Right Latch
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 78-31-49-860-085-A ** ON A/C NOT FOR ALL
Subtask 78-31-49-420-076-A ** ON A/C NOT FOR ALL
Subtask 78-31-49-440-080-A ** ON A/C NOT FOR ALL Subtask 78-31-49-410-089-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:11:40 UTC
Installation of the Lower Supply Pipe of the Right Latch
WARNING:
WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU WORK ON PRESSURIZED SYSTEMS.
WARNING:
DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
- FLUSH IT AWAY WITH CLEAN WATER
- GET MEDICAL AID.
CAUTION:
USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
1. Reason for the Job- ONE WRENCH TO HOLD THE UNION, AND
- ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2245) | finish paint EA4 blue 5991 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-30-00-710-040-B | Thrust Reverser Hydraulic System Bleed Procedure |
Lower Supply Pipe of the Right LatchSubtask 78-31-49-860-085-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 78-31-49-010-142-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 78-31-49-040-132-A ** ON A/C NOT FOR ALL 4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 78-31-49-420-076-A ** ON A/C NOT FOR ALL
A. Installation of the Lower Supply Pipe of the Right Latch
(1) Remove the protective covers from the pipe ends.
(2) Put the lower supply pipe in position on the forward frame.
(3) Connect the lower supply pipe to the hydraulic control unit and the lower latch.
(4) TORQUE the coupling nuts to between 150 and 130 lbf.in (1.70 and 1.47 m.daN )
.
(5) Attach the upper half clamp to the lower hydraulic line bracket with the bolt and the washer.
(6) Attach the double flange and the upper half clamps to the double hydraulic line bracket with the nut and the bolts.
(7) Attach the upper half clamp to the middle hydraulic line bracket with the bolt and the washer.
(8) Attach the flange and the upper half clamps to the upper hydraulic line bracket with the bolts and the nuts.
(9) TORQUE the bolts that attach the upper half clamps to between 30 and 27 lbf.in (0.34 and 0.31 m.daN ).
5. Close-up(1) Remove the protective covers from the pipe ends.
(2) Put the lower supply pipe in position on the forward frame.
(3) Connect the lower supply pipe to the hydraulic control unit and the lower latch.
(4) TORQUE the coupling nuts to between 150 and 130 lbf.in (1.70 and 1.47 m.daN )
. (5) Attach the upper half clamp to the lower hydraulic line bracket with the bolt and the washer.
(6) Attach the double flange and the upper half clamps to the double hydraulic line bracket with the nut and the bolts.
(7) Attach the upper half clamp to the middle hydraulic line bracket with the bolt and the washer.
(8) Attach the flange and the upper half clamps to the upper hydraulic line bracket with the bolts and the nuts.
(9) TORQUE the bolts that attach the upper half clamps to between 30 and 27 lbf.in (0.34 and 0.31 m.daN )
. NOTE: Apply a witness line of finish paint EA4 blue 5991 (Material No.CP2245) on all nuts and connections after they are torqued.
(10) Put the thermal blanket on the blocker door latch. Turn the Dzus fastener on the blanket 1/4 turn to lock it. Subtask 78-31-49-440-080-A ** ON A/C NOT FOR ALL Subtask 78-31-49-410-089-A ** ON A/C NOT FOR ALL
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
Subtask 78-31-49-710-070-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).