Reactivation of the Cowl Opening Actuator [CFMB]

TASK 78-36-00-440-802-B
Reactivation of the Cowl Opening Actuator

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

1. Reason for the Job
CDL 78-01
THRUST REVERSER OPENING ACTUATOR
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	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

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 78-36-00-010-804-B	Opening of the Thrust Reverser Doors with One or More Door Opening Actuator(s) Defective
TASK 78-36-00-410-804-B	Closing of the Thrust Reverser Doors with One or More Door Opening Actuator(s) Defective
TASK 78-36-51-400-041-A	Installation of the Thrust Reverser Half Door Opening Actuator
Capping of the Disconnected Inner Supply Pipe of the Cowl Opening Actuator System

3. Job Set-up
Subtask 78-36-00-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU, make sure that the ON legend of ENG/FADEC GND PWR/1(2) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 78-36-00-010-096-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-804):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-36-00-040-072-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 78-36-00-440-064-A ** ON A/C NOT FOR ALL

A. Reactivation of the Cowl Opening Actuator

Capping of the Disconnected Inner Supply Pipe of the Cowl Opening Actuator System ** ON A/C NOT FOR ALL

CAUTION: COVER THE CORE ENGINE COMPRESSOR CASE WITH A PROTECTIVE COVER TO MAKE SURE THAT HYDRAULIC FLUID DOES NOT LEAK ONTO THE COMPRESSOR CASE.

(1) Install COVER - PROTECTION over the compressor cases of the core.
(2) Remove the flareless tube cap (MS21914-4J) from the disconnected inner supply pipe.
(3) Install the cowl opening actuator (Ref. AMM TASK 78-36-51-400-041).
(4) Remove the COVER - PROTECTION.

5. Close-up
Subtask 78-36-00-410-081-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl doors with one or more door opening actuator defective (Ref. AMM TASK 78-36-00-410-804):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-36-00-440-065-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 78-36-00-410-082-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Remove the access platform(s).
(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).

[Rev.10 from 2021] 2026.04.01 03:26:26 UTC