Installation of the Thrust Reverser Pressure Relief Door (452DR, 462DR) [IAE]

TASK 78-32-80-400-010-A
Installation of the Thrust Reverser Pressure Relief Door (452DR, 462DR)

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
IAE1N20023	1	ADAPTER-TORQUE TOOL

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 452DR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 462DR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
8	COTTERPIN	AIPC 78-32-80-80-040

D. 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
Pressure Relief Door (Post SB 78-0195)
Pressure Relief Door (Pre SB 78-0195)
FOR [1000EM2] (ENGINE-2)
Pressure Relief Door (Pre SB 78-0195)

3. Job Set-up
Subtask 78-32-80-860-050-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).
(3) Make sure that the aircraft is in the same configuration as for the removal task.

Subtask 78-32-80-010-052-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

Subtask 78-32-80-040-051-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 78-32-80-420-050-A ** ON A/C NOT FOR ALL

A. Install the pressure relief door
(1) FOR [1000EM1] (ENGINE-1)
452DR
(2) FOR [1000EM2] (ENGINE-2)
462DR

Pre SB 78-0195

Pressure Relief Door (Pre SB 78-0195) ** ON A/C NOT FOR ALL

(3) Put the pressure relief door (9) in to position on the right thrust reverser half (1) 452AR (462AR).
(4) Align the hinges of the pressure relief door with the hinges on the right thrust reverser half (1).
(5) Install a pin (6) and two washers (7) at each hinge position.
(6) Safety each pin (6) with a new AIPC 78-32-80-80-040 COTTERPIN (8) .
(7) Attachment of the lanyard assembly

CAUTION: BEFORE YOU ATTACH THE LANYARD ASSEMBLY TO THE RIGHT THRUST-REVERSER HALF AND THE PRESSURE RELIEF DOOR, MAKE SURE THE LENGTH OF THE LANYARD IS NOT MORE THAN 9.50 INCHES (241.3 MM) EYE TO EYE. THIS WILL HELP TO PREVENT DAMAGE TO THE THRUST REVERSER.

(a) If the lanyard (4) is damaged, or more than 9.5 in. (241.30 mm) in length eye to eye, replace it with a new lanyard assembly.
(8) Attach the lanyard assembly (4) to the pressure relief door (9), and the right thrust reverser half (1), with the bolts (2), the washers (3) and the nuts (5).
(9) TORQUE the nuts (5) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Post SB 78-0195

Pressure Relief Door (Post SB 78-0195) ** ON A/C NOT FOR ALL

(10) Put the pressure relief door (9) in the position on the right thrust reverser half (1) 452AR (462AR).
(11) Align the hinges of the pressure relief door with the hinges on the right thrust reverser half (1).
(12) Install a pin (6) and two washers (7) at each hinge position.
(13) Safety each pin (6) with a new AIPC 78-32-80-80-040 COTTERPIN (8).

5. Close-up
Subtask 78-32-80-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser pressure relief door.

Pressure Relief Door (Pre SB 78-0195) ** ON A/C NOT FOR ALL

(a) FOR [1000EM1] (ENGINE-1)
452DR
(b) FOR [1000EM2] (ENGINE-2)
462DR
(c) Install the IAE1N20023 ADAPTER-TORQUE TOOL on a breaker bar (hand tool).
(d) Put the IAE1N20023 ADAPTER-TORQUE TOOL into the latch bolt slot (10), (2 places) on the pressure relief door (9).

NOTE: The IAE1N20023 ADAPTER-TORQUE TOOL must rest evenly in the latch bolt slot (10).

(e) Close the door and apply a force to the wrench until the latch engages.

Subtask 78-32-80-440-050-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU: (Ref. AMM TASK 78-30-00-440-012)

Subtask 78-32-80-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) 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.
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:12:20 UTC