Installation of the Thrust Reverser Deflector Boxes [IAE]

TASK 78-32-19-400-010-A
Installation of the Thrust Reverser Deflector Boxes

CAUTION: EACH THRUST REVERSER HALF HAS EIGHT DEFLECTOR BOXES THAT ARE DIFFERENT IN THE ANGLE OF THE DEFLECTOR VANES. THE BOXES ARE NOT INTERCHANGEABLE.

ZONE: 400
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 install 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)
No specific	Torque wrench: range to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )

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 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing 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 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after 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 78-31-00-710-041-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
TASK 78-32-00-860-011-A	Manual Retraction of the Thrust Reverser Translating Sleeves
AIPC 78-32-19-
Deflector Boxes

3. Job Set-up
Subtask 78-32-19-860-050-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 the 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 the FADEC 1(2).

Subtask 78-32-19-010-053-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the translating sleeves are extended (Ref. AMM TASK 78-32-00-860-010) or (Ref. AMM TASK 78-31-00-710-041).

Subtask 78-32-19-040-052-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 78-32-19-210-050-A ** ON A/C NOT FOR ALL

A. Make sure that the correct location has been found for the deflector box that is to be installed AIPC 78-32-19-.

Subtask 78-32-19-420-050-A ** ON A/C NOT FOR ALL

B. Install the deflector box.

Deflector Boxes ** ON A/C NOT FOR ALL

(1) Position the deflector box (1) on the support rings (4) of the C-duct.
(2) Attach the deflector box with the eight bolts (3) and the eight washers (2).

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 11.00 mm socket wrench to install the deflector box bolts.

(3) TORQUE the bolts to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )

in the sequence shown (Ref. AMM TASK 70-23-11-911-013).

5. Close-up
Subtask 78-32-19-410-051-A ** ON A/C NOT FOR ALL

A. Manually retract the translating sleeve (Ref. AMM TASK 78-32-00-860-011).

Subtask 78-32-19-440-050-A ** ON A/C NOT FOR ALL

B. Activate the Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-440-012).

Subtask 78-32-19-410-050-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

Subtask 78-32-19-710-050-A ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).

NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).

[Rev.10 from 2021] 2026.04.01 03:28:15 UTC