Installation of the Thrust Reverser Right Hand Lower Actuator [CFML]

TASK 78-31-43-400-801-A
Installation of the Thrust Reverser Right Hand Lower 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.

ZONE: 400
FIN: 3001KM2

1. Reason for the Job
This procedure gives the instructions to install the right hand lower actuator. The right hand lower actuator is also known as the Synchronized Manual Locking Actuator (SMLA).
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 the some of the installation steps to save time.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD
No specific	Torque wrench: range to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in )
No specific	Torque wrench: range to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )
No specific	Torque wrench: range to between 0.52 and 0.38 m.daN (46.02 and 33.63 lbf.in )
No specific	Torque wrench: range to between 2.71 and 1.80 m.daN (19.99 and 13.27 lbf.ft )
No specific	Torque wrench: range to between 6.22 and 5.31 m.daN (45.87 and 39.16 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
11	COTTER PIN	AIPC 78-30-25-10-480

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
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 78-31-44-400-802-A	Installation of the Sync Tubes, Sync Shafts, Flex Tube and Flex Shaft
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
SPM 702400910814
Thrust Reverser Right Hand Lower Actuator
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
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 29-10-00-864-002-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)

3. Job Set-up
Subtask 78-31-43-941-051-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:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(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 78-31-43-010-051-A

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

Subtask 78-31-43-040-051-A

C. Deactivation of the Thrust Reverser System for Nacelle Maintenance

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).

Subtask 78-31-43-010-052-A

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 (TLS) (Ref. AMM TASK 78-37-00-040-803).
(3) Make sure that the translating cowl is manually deployed by the distance recorded during thrust reverser deployment in the actuator removal procedure (Ref. AMM TASK 78-32-50-010-801).
(4) Make sure that the MAT - PROTECTIVE is in position under the hydraulic connections of the right hand lower actuator.

Subtask 78-31-43-864-051-A

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
Subtask 78-31-43-420-050-A

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. ANY UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND SOME PARTS.

A. Installation of the Thrust Reverser Right Hand Lower Actuator

NOTE: Each time TRIPLE TORQUE is required, perform as per SPM 702400910814.

NOTE: Remove CAP - PROTECTION from all open ports, tubes and hoses.

NOTE: Do a mark on connection after tightening application, refer to Standard Practices chapter (Ref. AMM TASK 20-23-22-910-001).

(1) Adjust the rod length of the replacement actuator (6) before you install it as follows:

CAUTION: DO NOT LET THE ACTUATOR ROD TURN DURING THE REMOVAL AND INSTALLATION PROCEDURE. IF IT TURNS, DESYNCHRONIZATION OF THE ACTUATOR WILL OCCUR. IT WILL THEN BE NECESSARY TO SEND THE ACTUATOR BACK TO SAFRAN FOR SYNCHRONIZATION.

(a) Hold the rod end of the replacement actuator (6) during the adjustment procedure. Do not let the rod end turn.
(b) Install a WRENCH - STANDARD into the Manual Drive Unit (MDU) (14).
(c) Make sure that the actuator is fully stowed.
(d) Turn the MDU (14) the same number of turns as recorded at the start of the actuator removal procedure. This step is necessary to extend the actuator rod end to the same position as the other actuators.
(2) Lubricate the threads of the screws that follow with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) :

Eight screws (1)
Two screws (20)
Two screws (23).

(3) Install the actuator (6) as follows:

(a) Carefully lift the actuator (6) and move it in the aft direction, into position, through the torque box (24) of the thrust reverser.
1 Align the aft end of the actuator with the fitting (7) on the translating cowl (3).
(4) Attach the actuator (6) to the torque box (24) as follows:
(a) Install the two gimbal pins (21) in the actuator (6).
(b) Put the two screws (20) and the locking plate (19) that hold the upper gimbal pin (21) in position on the actuator (6).
(c) Put the two screws (23), the two washers (30) and the locking plate (22) that hold the gimbal pin (21) in position on the actuator (6).
(d) TORQUE the four screws (20) and (23) to between 0.52 and 0.38 m.daN (46.02 and 33.63 lbf.in )

.
(5) Connect the aft end of the actuator (6) to the translating cowl (3) as follows:
(a) Install the bolt (5), sleeve bushing (10), washer (9) and nut (8) to attach the aft end of the actuator (6) to the fitting (7).
(b) TORQUE the nut (8) at the aft end of the actuator to between 2.71 and 1.80 m.daN (19.99 and 13.27 lbf.ft )

.
(c) Installation of the cotter pin (11):

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 78-30-25-10-480 COTTER PIN (11) in the bolt (5) to lock the nut (8) in position.
(d) Install the actuator access panel (2) on the translating cowl (3) with eight screws (1).
(e) TORQUE the screws (1) to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in )

.
(6) Connect the tube nut of the hydraulic tube (12) to the mating fitting on the actuator (6).
(7) Install the screw (27) and the P-clamp (28) on the hydraulic tube (12).
(a) TORQUE the screws (27) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
(8) Install the MDU (14) on the right hand lower actuator (actuator) (6) (Ref. AMM TASK 78-31-45-400-801).
(9) Close the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-410-806).
(10) Synchronize the four actuators (Ref. AMM TASK 78-31-41-820-801).
(11) Install the flex shaft (15) on right hand side (Ref. AMM TASK 78-31-44-400-802).
(12) TRIPLE TORQUE the tube nut of the hydraulic tube (12) to between 6.22 and 5.31 m.daN (45.87 and 39.16 lbf.ft )

5. Close-up
Subtask 78-31-43-869-052-A

A. Close Access
(1) Do a visual leak check at the joint connections.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the MAT - PROTECTIVE.

Subtask 78-31-43-863-050-A

B. 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).
(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).
(3) Pressurize the related hydraulic system.

Subtask 78-31-43-440-050-A

C. Do the reactivation of the Thrust Reverser after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-31-43-410-051-A

D. 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 (TLS) (Ref. AMM TASK 78-37-00-440-803).

Subtask 78-31-43-710-050-A

E. Test
(1) Do an operational test of the thrust reverser (Ref. AMM TASK 73-29-00-740-804).
(2) Check that there is no hydraulic leak.

Subtask 78-31-43-410-050-A

F. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:35:15 UTC