DOC AIRBUS | AMM A320FDrain the Pipes of the Actuator System [CFMB]
TASK 78-30-00-680-001-A
Drain the Pipes of the Actuator System
1. Reason for the Job
The thrust reverser consists of a left and right half door. Each half includes an upper and a lower blocker door actuator and a latch mechanism. The actuators and latch mechanism are hydraulically operated. When you drain the lower actuator and latch mechanism you also drain the upper.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 78-30-00-941-054-A ** ON A/C NOT FOR ALL
Subtask 78-30-00-680-050-A ** ON A/C NOT FOR ALL
(2) Disconnect the nuts of head and rod supply hoses from the actuator. Let the hydraulic fluid drain completely from the hoses.
(3) Reconnect the nut of the head supply hose on the lower blocker door actuator.
(4) TORQUE the nut to between 3.0 and 2.7 m.daN (22.12 and 19.91 lbf.ft )
(5) Reconnect the nut of the rod supply hose on the lower blocker door actuator.
(6) TORQUE the nut to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
(7) Remove the container.
5. Close-up
Subtask 78-30-00-440-051-A ** ON A/C NOT FOR ALL Subtask 78-30-00-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:23:50 UTC
Drain the Pipes of the Actuator System
1. Reason for the Job
The thrust reverser consists of a left and right half door. Each half includes an upper and a lower blocker door actuator and a latch mechanism. The actuators and latch mechanism are hydraulically operated. When you drain the lower actuator and latch mechanism you also drain the upper.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
| 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 |
Drain Locations for the Left Door of the Thrust ReverserSubtask 78-30-00-941-054-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 78-30-00-010-053-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 78-30-00-040-051-A ** ON A/C NOT FOR ALL 4. Procedure(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 78-30-00-680-050-A ** ON A/C NOT FOR ALL
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:
- ONE WRENCH TO HOLD THE UNION, AND
- ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
CAUTION:
MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND ORIFICES OR DAMAGE CAN OCCUR.
CAUTION:
YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
A. Drain the pipes of the actuactor system. NOTE: The procedure is the same for LH and RH sides.
(1) Put a CONTAINER 5 L (1.32 USGAL) under the lower blocker door actuator. (2) Disconnect the nuts of head and rod supply hoses from the actuator. Let the hydraulic fluid drain completely from the hoses.
(3) Reconnect the nut of the head supply hose on the lower blocker door actuator.
(4) TORQUE the nut to between 3.0 and 2.7 m.daN (22.12 and 19.91 lbf.ft )
(5) Reconnect the nut of the rod supply hose on the lower blocker door actuator.
(6) TORQUE the nut to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
(7) Remove the container.
Subtask 78-30-00-440-051-A ** ON A/C NOT FOR ALL Subtask 78-30-00-410-053-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) Remove the access platform(s).
(3) 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
(4) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) 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
(4) Remove the WARNING NOTICE(S).