Removal of the Left Thrust Reverser Blocker Door Bumpers [IAE]

TASK 78-32-45-000-803-A
Removal of the Left Thrust Reverser Blocker Door Bumpers

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

1. Reason for the Job
This task supplies the data to remove the five thrust reverser blocker door bumpers. The upper bumper uses a wedge to support the bumper assembly, the four lower bumpers use a filler in place of the wedge.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SCRAPER - NON METALLIC
No specific	AR	SPATULA - METALLIC
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 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-860-010-A	Manual Extension of the Thrust Reverser Translating Sleeves
TASK 78-32-45-000-010-A	Removal of the Left Thrust Reverser Blocker Doors
Left Thrust Reverser Blocker Door Bumpers

3. Job Set-up
Subtask 78-32-45-941-058-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five 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) in position to tell persons not to energize the FADEC 1(2).

Subtask 78-32-45-010-069-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 78-32-45-040-059-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-45-860-055-A ** ON A/C NOT FOR ALL

D. Manually extend the translating sleeves approximately 3 in. (76.2 mm) to 4 in. (101.6 mm) (Ref. AMM TASK 78-32-00-860-010).

Subtask 78-32-45-010-070-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 78-32-45-020-052-A ** ON A/C NOT FOR ALL

A. Remove the Left Thrust Reverser Blocker Doors (Ref. AMM TASK 78-32-45-000-010).

Subtask 78-32-45-020-053-A ** ON A/C NOT FOR ALL

B. Removal of the Left Thrust Reverser Blocker Door Bumpers

Left Thrust Reverser Blocker Door Bumpers ** ON A/C NOT FOR ALL

(1) Remove the bumper assemblies (1) from the filler (2) or wedge (3).
(a) Use a SPATULA - METALLIC to remove all unwanted material from the previous installation.
(2) Remove the filler (2) or wedge (3) from the bond panel.
(a) Use a SCRAPER - NON METALLIC to carefully remove all unwanted material from the bond panel.

[Rev.10 from 2021] 2026.04.01 13:12:38 UTC