Functional Check of Pressure Relief Door Latch Tension [PW11]

TASK 78-32-46-720-801-A
Functional Check of Pressure Relief Door Latch Tension

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

ZONE: 400

1. Reason for the Job
Refer to the MPD TASK: 783200-W6
FUNCTIONAL CHECK OF PRESSURE RELIEF DOOR LATCH TENSION.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE
636-3000-35GSE	1	PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-32-46-000-803-A	Removal of the Pressure Relief Door Latch
TASK 78-32-46-400-803-A	Installation of the Pressure Relief Door Latch
Pressure Relief Door Latch (Tension)

3. Job Set-up
Subtask 78-32-46-860-058-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 78-32-46-040-065-A ** ON A/C NOT FOR ALL

B. Deactivation of the Thrust Reverser for Ground Maintenance

WARNING: MAKE SURE THAT YOU DO THE DEACTIVATION OF THE THRUST REVERSER BEFORE YOU DO MAINTENANCE WORK ON OR AROUND THE THRUST REVERSER. IF YOU DO NOT DO THIS PROCEDURE, THERE IS A RISK OF UNWANTED OPERATION AND THUS OF INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 78-32-46-010-082-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 78-32-46-720-050-A ** ON A/C NOT FOR ALL

A. Do a Functional Check of the Pressure Relief Door Latch Tension
(1) Make sure that the pressure relief door is closed.

CAUTION: WHEN YOU DO A CHECK OF THE LATCH TENSION, MAKE SURE THAT YOU APPLY THE CORRECT TORQUE VALUES TO THE PRESSURE-RELIEF DOOR LATCHES. IF YOU APPLY TOO MUCH TORQUE, DAMAGE TO THE PRESSURE-RELIEF DOOR LATCH AND TOOL(S) CAN OCCUR.

(2) Test the release load settings of the pressure relief door latch with the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER. Refer to the manufacturer's instructions.
(a) Install the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER into the WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE.
(b) Set the torque limit of the WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE to the minimum permitted torque of 62 lbf.in (0.70 m.daN).
(c) Put the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER into the trigger slot on the pressure relief door latch.
(d) Apply torque in the opening direction.
1 If the pressure relief door latch unlocks and releases, replace the pressure relief door latch (Ref. AMM TASK 78-32-46-000-803) and (Ref. AMM TASK 78-32-46-400-803).
2 If the pressure relief door latch does not unlock and release, continue to Para. 4.A.(2)(e).
(e) Remove the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER and WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE from the pressure relief door latch.
(f) Set the torque limit of the WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE to the maximum permitted torque of 75 lbf.in (0.85 m.daN).
(g) Put the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER into the trigger slot on the pressure relief door latch.
(h) Apply torque in the opening direction.
1 If the pressure relief door latch unlocks and releases, continue to Para. 4.A.(2)(i).
2 If the pressure relief door latch does not unlock and release, replace the pressure relief door latch (Ref. AMM TASK 78-32-46-000-803) and (Ref. AMM TASK 78-32-46-400-803).
(i) Keep the torque limit on the WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE at 75 lbf.in (0.85 m.daN).
(j) Apply torque in the closing direction until the pressure relief door latch fully engages and locks.
1 If the pressure relief door latch does not fully engage and lock, replace the pressure relief door latch (Ref. AMM TASK 78-32-46-000-803) and (Ref. AMM TASK 78-32-46-400-803).
(k) Remove the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER and WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE from the pressure relief door latch.
(l) Remove the 636-3000-35GSE PRESS. RELIEF LATCH CORE COWL DOOR PRESSURE TESTER from the WRENCH - TORQUE, 3/8 IN. SQUARE DRIVE.

5. Close-up
Subtask 78-32-46-410-074-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) Make sure that the pressure relief door is closed.

Subtask 78-32-46-440-060-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 78-32-46-410-073-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 03:33:35 UTC