Removal of the Thrust Reverser Half Door Opening Actuator [CFMB]

TASK 78-36-51-000-041-A
Removal of the Thrust Reverser Half Door Opening Actuator

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.

THIS PREVENTS DAMAGE TO THE PARTS.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
Thrust Reverser Left Hand Cowl Opening Actuator
Thrust Reverser Right Hand Cowl Opening Actuator

3. Job Set-up
Subtask 78-36-51-941-050-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 78-36-51-010-050-A ** ON A/C NOT FOR ALL

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 the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-36-51-869-050-A ** ON A/C NOT FOR ALL

C. Retract the Wing Slats

CAUTION: RETRACT WING SLATS BEFORE OPENING THRUST REVERSER OR DAMAGE CAN OCCUR.

(1) Retract the wing slats (Ref. AMM TASK 27-80-00-866-005) and install a WARNING NOTICE(S).

Subtask 78-36-51-040-050-A ** ON A/C NOT FOR ALL

D. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041):

Subtask 78-36-51-010-051-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser doors to 45 degrees position (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 78-36-51-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Thrust Reverser Half Door Opening Actuator
(1) Loosen the clamp (25) and remove the flexible cooling hose (35) or (85) from the lower cooling jacket (45) or (70).
(2) Disconnect the hydraulic hose (60) from the actuator (50) and the inner supply pipe on the half door.
(3) Put protective covers on the two ends of the hose, the inner supply pipe and the actuator.
(4) Remove and discard the cotter pins (5).
(5) Remove the nuts (10), washers (15) and bolts (20) that attach the actuator (50) to the half door and the pylon.
(6) Remove the cowl opening actuator (50).
(7) Loosen the clamps (40) that attach the cooling jackets and remove them from the cowl opening actuator (50).
(8) Remove the upper cooling jacket (55) or (65) from the cowl opening actuator.
(9) Remove the lower cooling jacket (45) or (70) from the cowl opening actuator.
(10) Loosen the clamp (25) and remove the flexible cooling hose (35) or (85) from the inlet scoop (30) or (75).
(11) For the right hand cowl opening actuator only. Loosen the nut (80) and remove from the clamp (90) from the stud pipe clip (95).
(12) For the right hand cowl opening actuator only. Remove from the clamp (90) from the flexible cooling hose (85).

[Rev.10 from 2021] 2026.04.01 13:11:55 UTC