Removal of the Left Thrust Reverser Blocker Doors [IAE]

TASK 78-32-45-000-010-A
Removal of the Left Thrust Reverser Blocker Doors

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 one thrust reverser blocker door, the procedure for the other four doors is the same.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
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
Left and Right Thrust Reverser Blocker Doors

3. Job Set-up
Subtask 78-32-45-941-050-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 78-32-45-010-050-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 78-32-45-040-050-A ** ON A/C NOT FOR ALL

C. Deactivate 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 78-32-45-860-050-A ** ON A/C NOT FOR ALL

D. Manual Extension of the Translating Sleeves

CAUTION: DO NOT EXTEND THE THRUST REVERSER TRANSLATING SLEEVE WITH THE THRUST REVERSER HALVES FULLY OPEN. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE CAN OCCUR TO: - THE SYNCHRONIZING CABLES OF THE TRANSLATING SLEEVE - THE HINGE ACCESS PANELS OF THE THRUST REVERSER HALVES - THE PYLON PROFILES, AND - THE TRANSLATING SLEEVE.

CAUTION: IF YOU OPEN THE THRUST REVERSER HALVES AFTER YOU EXTENDED THE TRANSLATING SLEEVES, MAKE SURE THAT: - THE SLATS ARE RETRACTED, AND - YOU REMOVE THE PROFILES AND THE HINGE ACCESS PANELS. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.

(1) 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 78-32-45-010-051-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 78-32-45-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Left Thrust Reverser Blocker Doors:

Pre SBN 78-0032

(1) Disconnect the drag link from the fitting

Left and Right Thrust Reverser Blocker Doors ** ON A/C NOT FOR ALL

(a) Remove the cotter pin (15), the washers (16) and the pin (17) which attach the drag link (5) to the fitting (18).

SBN 78-0032

(2) Disconnect the drag link from the fitting
SBN 78-0032: Changed attachment of the drag link to the fitting.
(a) Remove the cotter pin (15), the nut (19), the washer (16) (for A1 Engines) or the washers (16) (for A5 Engines) and the bolt (20) which attach the drag link (5) to the fitting (18).
(3) Remove the blocker door from the translating sleeve

Left and Right Thrust Reverser Blocker Doors ** ON A/C NOT FOR ALL

(a) Remove the nut (14), the bolt (12), the washer (13), the bushing (11), the bushing (4) and the washer (2) which attach the upper hinge of the blocker door to the translating sleeve.
(b) Remove the nut (1), the bolt (3), the washers (21), (22), (23) and the bushing (24) which attach the lower hinge of the blocker door to the translating sleeve.
(c) Remove the blocker door (10) with the drag link (5).
Pre SBN 78-0013
(4) Remove the drag link from the blocker door

Left and Right Thrust Reverser Blocker Doors ** ON A/C NOT FOR ALL

(a) Remove the nut (6), the bolt (8) and the washers (7).
(b) Remove the drag link (5).
SBN 78-0013
(5) Remove the drag link from the blocker door

Left and Right Thrust Reverser Blocker Doors ** ON A/C NOT FOR ALL

SBN 78-0013: Changed attachment of the drag link to the blocker door.
(a) Remove the nut (6), bolt (8), the washers (7), and the spacers (9).
(b) Remove the drag link (5).

[Rev.10 from 2021] 2026.04.01 03:28:35 UTC