Removal of the Thrust Reverser Deflector Boxes [IAE]

TASK 78-32-19-000-010-A
Removal of the Thrust Reverser Deflector Boxes

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 thrust reverser deflector boxes.
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
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

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 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-32-00-860-010-A	Manual Extension of the Thrust Reverser Translating Sleeves
Deflector Boxes

3. Job Set-up
Subtask 78-32-19-941-050-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 78-32-19-010-050-A ** ON A/C NOT FOR ALL

B. Extend the translating sleeve, by one of two methods, manually or with power, to get access to the deflector boxes (Ref. AMM TASK 78-32-00-860-010) or (Ref. AMM TASK 78-31-00-710-041).

Subtask 78-32-19-010-051-A ** ON A/C NOT FOR ALL

C. 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 78-32-19-040-050-A ** ON A/C NOT FOR ALL

D. 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).

4. Procedure
Subtask 78-32-19-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Deflector Box:

Deflector Boxes ** ON A/C NOT FOR ALL

(1) Make a mark on the deflector box to show its position on the C-duct.
(2) Remove the eight bolts (3) and the eight washers (2) that attach the deflector box (1) to the support rings (4) on the C-duct.

NOTE: Access to the deflector boxes in the top 45 degrees of the thrust reverser is difficult. Use a 0.25 in. (6.35 mm) ratchet drive and 11 mm socket wrench to remove the deflector box bolts.

(3) Remove the deflector box.

[Rev.10 from 2021] 2026.04.01 13:12:30 UTC