DOC AIRBUS | AMM A320FInstallation of the Thrust Reverser Left Hand Upper Actuator [CFML]
TASK 78-31-41-400-804-A
Installation of the Thrust Reverser Left Hand Upper Actuator
This procedure gives the instructions to install the left hand upper actuator. The two upper actuators are also known as the Synchronized Locking Feedback Actuators (SLFA).
At the end of this procedure, you must synchronize the thrust reverser actuators (Ref. AMM TASK 78-31-41-820-801). You can do the synchronization together with some of the installation steps to save time.
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 78-31-41-941-076-A
Subtask 78-31-41-420-074-A
Subtask 78-31-41-869-062-A
[Rev.10 from 2021]
2026.04.01 03:35:05 UTC
Installation of the Thrust Reverser Left Hand Upper Actuator
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis procedure gives the instructions to install the left hand upper actuator. The two upper actuators are also known as the Synchronized Locking Feedback Actuators (SLFA).
At the end of this procedure, you must synchronize the thrust reverser actuators (Ref. AMM TASK 78-31-41-820-801). You can do the synchronization together with some of the installation steps to save time.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL00062) | synthetic base lubricating oil - turbine engine |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 20 | COTTER PIN | AIPC 78-30-24-10-605 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-23-22-910-001-A | Marking of the Unions after Application of Standard or Specific Tightening Torque |
| TASK 70-24-00-910-814-A | Standard Torque Recommendations |
| TASK 70-70-00-910-804-A | Electrical Standard Practices |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 73-29-00-740-804-A | Thrust Reverser Cycling Test (Menu Mode) |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
| TASK 78-31-41-040-802-A | Unlocking of the Thrust-Reverser Upper Actuators |
| TASK 78-31-41-440-802-A | Locking of the Thrust-Reverser Upper Actuators |
| TASK 78-31-41-820-801-A | Synchronize the Thrust Reverser Actuators |
| TASK 78-31-45-000-801-A | Removal of the Manual Drive Unit (MDU) |
| TASK 78-31-45-400-801-A | Installation of the Manual Drive Unit (MDU) |
| TASK 78-32-50-010-801-A | Manually Deploy the Translating Cowl |
| TASK 78-32-50-410-801-A | Manually Stow the Translating Cowl |
| TASK 78-36-00-410-806-A | Closing of the Thrust Reverser Cowl Doors |
| TASK 78-37-00-040-803-A | Deactivation of the Electrical Tertiary Lock System |
| TASK 78-37-00-440-803-A | Activation of the Electrical Tertiary Lock System |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| TASK 29-10-00-863-001-A | Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| TASK 29-10-00-863-002-A | Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
Thrust Reverser Left Hand Upper ActuatorSubtask 78-31-41-941-076-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 78-31-41-010-094-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is immediately forward of the left hand upper actuator under the fan cowl door.
Subtask 78-31-41-040-075-A (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is immediately forward of the left hand upper actuator under the fan cowl door.
C. Deactivation of the Thrust Reverser System for Nacelle Maintenance
Subtask 78-31-41-010-095-A WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Make sure that you did the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807). D. Get Access
(1) Make sure that the two upper actuators are unlocked (Ref. AMM TASK 78-31-41-040-802).
(2) Make sure that you did the deactivation of the electrical tertiary lock system (Ref. AMM TASK 78-37-00-040-803).
(a) Make sure that the translating cowl are manually deployed a minimum distance of 25 mm (0.98 in.) and a maximum distance of 51 mm (2.01 in.) (Ref. AMM TASK 78-32-50-010-801).
(3) Make sure that the MAT - PROTECTIVE is in position under the hydraulic connections on the left-hand upper actuator (actuator) (7).
Subtask 78-31-41-864-053-A (1) Make sure that the two upper actuators are unlocked (Ref. AMM TASK 78-31-41-040-802).
(2) Make sure that you did the deactivation of the electrical tertiary lock system (Ref. AMM TASK 78-37-00-040-803).
(a) Make sure that the translating cowl are manually deployed a minimum distance of 25 mm (0.98 in.) and a maximum distance of 51 mm (2.01 in.) (Ref. AMM TASK 78-32-50-010-801).
(3) Make sure that the MAT - PROTECTIVE is in position under the hydraulic connections on the left-hand upper actuator (actuator) (7).
E. Depressurization of the Aircraft Hydraulic Systems
(1) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the applicable system.
(a) On the HYD/FUEL panel 40VU of the overhead panel
(b) On the ground service panel of the applicable hydraulic system.
(2) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
(a) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(b) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
(a) Make sure that the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-002).
(b) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
4. Procedure(1) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the applicable system.
(a) On the HYD/FUEL panel 40VU of the overhead panel
(b) On the ground service panel of the applicable hydraulic system.
(2) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
(a) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(b) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
(a) Make sure that the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-002).
(b) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 78-31-41-420-074-A
A. Installation of the Thrust Reverser Left Hand Upper Actuator
(2) Do a mark on connection after tightening application (Ref. AMM TASK 20-23-22-910-001).
(3) Adjust the rod length of the actuator (7) before you install it as follows:
(b) Temporarily remove the MDU from one of the lower actuators (Ref. AMM TASK 78-31-45-000-801).
(c) Temporarily install the MDU onto one of the drive sockets in the actuator (7) (Ref. AMM TASK 78-31-45-400-801).
(d) Hold the rod end of the replacement actuator (7) during the adjustment procedure. Do not let the rod end turn.
(e) Install the WRENCH - STANDARD at the input of the MDU.
(f) Turn the WRENCH - STANDARD the same number of turns as recorded at the start of the removal procedure. This will set the actuator rod end to the same position as the other actuators.
(g) Remove the MDU from the actuator (7) and install it back on the lower actuator from which it was temporarily removed (Ref. AMM TASK 78-31-45-000-801) and (Ref. AMM TASK 78-31-45-400-801).
(4) Lubricate the threads of the eight screws (1) and the four screws (25) with synthetic base lubricating oil - turbine engine (Material No.CPNCL00062) .
(5) Carefully lift the actuator (7) and move it in the aft direction, into position, through the forward frame of the thrust reverser.
(6) Align the aft end of the actuator with the fitting (17) on the transcowl (3).
(a) Install the two gimbal pins (26) in the actuator (7).
(b) Install the four screws (25) and the two locking plates (24) that hold the two gimbal pins (26) in position on each side of the actuator (7).
(c) TORQUE the four screws (25) to between 0.52 and 0.38 m.daN (46.02 and 33.63 lbf.in )
.
(8) Connect the aft end of the actuator (7) to the transcowl (3) as follows:
(a) Put the aft end of the actuator (7) in position on the fitting (17).
(b) Install the bolt (22), sleeve bushing (21), washer (18) and nut (19) to attach the aft end of the actuator (7) to the fitting (17).
(c) TORQUE the nut (19) to between 2.71 and 1.80 m.daN (19.99 and 13.27 lbf.ft ).
(d) Installation of the cotter pin (20):
(e) Install the actuator access panel (2) on the transcowl (3) with the eight screws (1).
(f) TORQUE the eight screws (1) to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in ).
(9) Install the hydraulic tube (4) to the thrust reverser as follows:
(a) Put the hydraulic tube (4) in position between the actuator (7) and the lower actuator.
(b) Loosely install the bolt (27) that attaches the P-clamp (28) to the support bracket at each of the five locations along the length of the hydraulic tube (4).
(c) Connect the tube nut of the hydraulic tube (4) to the actuator (7).
(d) Connect the tube nut of the hydraulic tube (4) to the lower actuator.
(e) TORQUE the five bolts (27) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ).
(f) TRIPLE TORQUE the tube nuts at the upper and lower ends of the hydraulic tube (4) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ).
(10) Connect the hydraulic tubes to the actuator (7) as follows:
(a) Connect the sync shaft (6) in the sync tube (5) to the actuator (7).
(b) Extend the trombone fitting and connect the tube nut of the sync tube (5) to the actuator (7).
(c) Connect the tube nut of the hydraulic tube (13) to the actuator (7).
(d) Connect the tube nut of the hydraulic tube (4) to the actuator (7).
(e) Connect the tube nut of the T-fitting (9) to the actuator (7).
(f) Put the upper flex shaft (12) through the T-fitting (9).
(g) Engage the upper flex shaft (12) with the square hole on the actuator (7).
(h) Connect the tube nut of the over-the-top (upper) flex tube (11) to the T-fitting (9).
(i) Connect the tube nut of the hydraulic tube (10) to the T-fitting (9).
(11) Close the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
(12) Synchronize the actuators (Ref. AMM TASK 78-31-41-820-801).
(13) TRIPLE TORQUE the tube nut of the hydraulic tube (15) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft ).
(14) TRIPLE TORQUE the tube nut of the hydraulic tube (13) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ).
(15) TRIPLE TORQUE the tube nut of the hydraulic tube (4) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ).
(16) TRIPLE TORQUE the tube nut on the sync tube (5) to between 11.92 and 9.66 m.daN (87.91 and 71.24 lbf.ft ).
(17) TRIPLE TORQUE the tube nut of the T-fitting (9) to the actuator (7) to between 11.92 and 9.66 m.daN (87.91 and 71.24 lbf.ft ).
(18) TRIPLE TORQUE the tube nut of the hydraulic tube (10) to the T-fitting (9) to between 8.42 and 7.01 m.daN (62.09 and 51.70 lbf.ft ).
(19) TRIPLE TORQUE the tube nut on the over-the-top (upper) flex tube (11)
to between 11.92 and 9.66 m.daN (87.91 and 71.24 lbf.ft ).
(20) Connect the three electrical connectors to the actuator (7) as follows (Ref. AMM TASK 70-70-00-910-804):
(b) Connect the electrical connectors (14) and (16) to the proximity sensors.
5. Close-upNOTE: Each time TRIPLE TORQUE is required, perform as per (Ref. AMM TASK 70-24-00-910-814).
(1) Remove the CAP - PROTECTION from all open ports, tubes and hoses. (2) Do a mark on connection after tightening application (Ref. AMM TASK 20-23-22-910-001).
(3) Adjust the rod length of the actuator (7) before you install it as follows:
NOTE: Make sure that actuator is unlocked (Ref. AMM TASK 78-31-41-040-802).
(a) Refer to the record made during the removal to find the number of turns made to the Manual Drive Unit (MDU) to deploy the transcowl (3). (b) Temporarily remove the MDU from one of the lower actuators (Ref. AMM TASK 78-31-45-000-801).
(c) Temporarily install the MDU onto one of the drive sockets in the actuator (7) (Ref. AMM TASK 78-31-45-400-801).
(d) Hold the rod end of the replacement actuator (7) during the adjustment procedure. Do not let the rod end turn.
(e) Install the WRENCH - STANDARD at the input of the MDU.
(f) Turn the WRENCH - STANDARD the same number of turns as recorded at the start of the removal procedure. This will set the actuator rod end to the same position as the other actuators.
(g) Remove the MDU from the actuator (7) and install it back on the lower actuator from which it was temporarily removed (Ref. AMM TASK 78-31-45-000-801) and (Ref. AMM TASK 78-31-45-400-801).
(4) Lubricate the threads of the eight screws (1) and the four screws (25) with synthetic base lubricating oil - turbine engine (Material No.CPNCL00062) .
(5) Carefully lift the actuator (7) and move it in the aft direction, into position, through the forward frame of the thrust reverser.
(6) Align the aft end of the actuator with the fitting (17) on the transcowl (3).
NOTE: Make sure that the actuator rod end does not turn during the installation procedure.
(7) Attach the actuator (7) to the torque box (23) as follows: (a) Install the two gimbal pins (26) in the actuator (7).
(b) Install the four screws (25) and the two locking plates (24) that hold the two gimbal pins (26) in position on each side of the actuator (7).
(c) TORQUE the four screws (25) to between 0.52 and 0.38 m.daN (46.02 and 33.63 lbf.in )
. (8) Connect the aft end of the actuator (7) to the transcowl (3) as follows:
(a) Put the aft end of the actuator (7) in position on the fitting (17).
(b) Install the bolt (22), sleeve bushing (21), washer (18) and nut (19) to attach the aft end of the actuator (7) to the fitting (17).
(c) TORQUE the nut (19) to between 2.71 and 1.80 m.daN (19.99 and 13.27 lbf.ft )
. (d) Installation of the cotter pin (20):
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
1 Install a new AIPC 78-30-24-10-605 COTTER PIN (20) in the nut (19) and bolt (22) at the aft end of the actuator (7). (e) Install the actuator access panel (2) on the transcowl (3) with the eight screws (1).
(f) TORQUE the eight screws (1) to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in )
. (9) Install the hydraulic tube (4) to the thrust reverser as follows:
(a) Put the hydraulic tube (4) in position between the actuator (7) and the lower actuator.
(b) Loosely install the bolt (27) that attaches the P-clamp (28) to the support bracket at each of the five locations along the length of the hydraulic tube (4).
(c) Connect the tube nut of the hydraulic tube (4) to the actuator (7).
(d) Connect the tube nut of the hydraulic tube (4) to the lower actuator.
(e) TORQUE the five bolts (27) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )
. (f) TRIPLE TORQUE the tube nuts at the upper and lower ends of the hydraulic tube (4) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )
. (10) Connect the hydraulic tubes to the actuator (7) as follows:
(a) Connect the sync shaft (6) in the sync tube (5) to the actuator (7).
(b) Extend the trombone fitting and connect the tube nut of the sync tube (5) to the actuator (7).
(c) Connect the tube nut of the hydraulic tube (13) to the actuator (7).
(d) Connect the tube nut of the hydraulic tube (4) to the actuator (7).
(e) Connect the tube nut of the T-fitting (9) to the actuator (7).
(f) Put the upper flex shaft (12) through the T-fitting (9).
(g) Engage the upper flex shaft (12) with the square hole on the actuator (7).
(h) Connect the tube nut of the over-the-top (upper) flex tube (11) to the T-fitting (9).
(i) Connect the tube nut of the hydraulic tube (10) to the T-fitting (9).
(11) Close the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
(12) Synchronize the actuators (Ref. AMM TASK 78-31-41-820-801).
(13) TRIPLE TORQUE the tube nut of the hydraulic tube (15) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )
. (14) TRIPLE TORQUE the tube nut of the hydraulic tube (13) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )
. (15) TRIPLE TORQUE the tube nut of the hydraulic tube (4) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )
. (16) TRIPLE TORQUE the tube nut on the sync tube (5) to between 11.92 and 9.66 m.daN (87.91 and 71.24 lbf.ft )
. (17) TRIPLE TORQUE the tube nut of the T-fitting (9) to the actuator (7) to between 11.92 and 9.66 m.daN (87.91 and 71.24 lbf.ft )
.(18) TRIPLE TORQUE the tube nut of the hydraulic tube (10) to the T-fitting (9) to between 8.42 and 7.01 m.daN (62.09 and 51.70 lbf.ft )
.(19) TRIPLE TORQUE the tube nut on the over-the-top (upper) flex tube (11)
to between 11.92 and 9.66 m.daN (87.91 and 71.24 lbf.ft )
. (20) Connect the three electrical connectors to the actuator (7) as follows (Ref. AMM TASK 70-70-00-910-804):
NOTE: If necessary, you can use the PLIERS - JAWED, SOFT to connect the electrical connectors.
(a) Connect the electrical connector (8) to the linear variable differential transducer on the actuator (7). (b) Connect the electrical connectors (14) and (16) to the proximity sensors.
Subtask 78-31-41-869-062-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the MAT - PROTECTIVE.
Subtask 78-31-41-410-085-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the MAT - PROTECTIVE.
B. Close Access
(1) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).
(2) Lock the two upper actuators (Ref. AMM TASK 78-31-41-440-802).
(3) Do the activation of the electrical tertiary lock system (Ref. AMM TASK 78-37-00-440-803).
Subtask 78-31-41-440-069-A (1) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).
(2) Lock the two upper actuators (Ref. AMM TASK 78-31-41-440-802).
(3) Do the activation of the electrical tertiary lock system (Ref. AMM TASK 78-37-00-440-803).
C. Do the reactivation of the Thrust Reverser after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-31-41-863-050-A D. Pressurization of the Aircraft Hydraulic Systems
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
(a) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(b) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
(a) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(b) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002).
Subtask 78-31-41-710-060-A (1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
(a) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(b) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
(a) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(b) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002).
E. Test(s)
(1) Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).
(a) Do a visual check to make sure that there are no hydraulic leaks.
Subtask 78-31-41-410-086-A (1) Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).
(a) Do a visual check to make sure that there are no hydraulic leaks.