Manual Stowing of the Blocker Door [CFMB]

TASK 78-32-41-860-002-A
Manual Stowing of the Blocker Door

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
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

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 78-31-00-710-042-A	Operational Test of the Thrust Reverser System
TASK 78-31-00-710-043-A	Operational Test of the Thrust Reverser without CFDS - Engine Not Running
TASK 78-31-00-710-043-A-01	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-32-41-080-001-A	Removal of the Safety Sleeve from Blocker Door Actuator
Hydraulic Actuator and Latch
Thermal Blankets of the Blocker Door Latches

3. Job Set-up
Subtask 78-32-41-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the 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 the ENG/FADEC GND PWR/1(2) pushbutton switch 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 78-32-41-010-065-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 78-32-41-040-064-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 78-32-41-860-051-B ** ON A/C NOT FOR ALL

A. Manual Stowing of the Blocker Door
(1) Remove the safety sleeve from the blocker door actuator (Ref. AMM TASK 78-32-41-080-001).
(2) Push in on the blocker door until the latch engages to close the blocker door.
(3) Put the thermal blankets (30), (35) and (40) on the blocker door latch (15). Turn the Dzus fastener on the blankets (30), (35) and (40) 1/4 turn to lock it.

Thermal Blankets of the Blocker Door Latches ** ON A/C NOT FOR ALL

5. Close-up
Subtask 78-32-41-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-41-410-050-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) 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).
(4) Remove the access platform(s).

Subtask 78-32-41-710-061-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do the operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-042).

NOTE: As an alternative procedure, you can do the operational test without the CFDS:

The first method with the engine not running (Ref. AMM TASK 78-31-00-710-043)
The second method with the engine running (Ref. AMM TASK 78-31-00-710-043).

[Rev.10 from 2021] 2026.04.01 03:52:10 UTC