Replacement of Rub Strips on the Pressure Relief Door [IAE]

TASK 78-32-80-960-801-A
Replacement of Rub Strips on the Pressure Relief Door

1. Reason for the Job
Replace missing or damaged rub strips.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	C-CLAMP - LARGE
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-393D)	solvent
(Material No.V01-438)	solvent
(Material No.V02-099)	lint free cloth
(Material No.V05-081)	waterproof silicon carbide abrasive paper
(Material No.V08-021)	adhesive
(Material No.V08-104)	adhesive

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
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
NSRM 543000
Pressure Relief Door

3. Job Set-up
Subtask 78-32-80-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 78-32-80-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-32-80-040-053-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) Do the deactivation of the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-80-010-055-A ** ON A/C NOT FOR ALL

D. Open the thrust recovery nozzle.

4. Procedure
Subtask 78-32-80-020-051-A ** ON A/C NOT FOR ALL

A. Remove the damaged rub strip from the pressure relief door. Do not gouge or scratch the base metal of the pressure relief door when you remove the rub strips.

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

B. Installation of the New Rub Strip
(1) Clean the faying surfaces of the metal. Use the solvent (Material No.V01-393D) or the solvent (Material No.V01-438) .
(2) Lightly abrade the pre-cleaned metal surface using the waterproof silicon carbide abrasive paper (Material No.V05-081) . Refer to NSRM 543000 general repairs.
(3) Remove any remaining sealant and contamination on the metal surfaces using the solvent (Material No.V01-393D) or the solvent (Material No.V01-438) and a lint free cloth (Material No.V02-099) .
(4) Lightly abrade the faying surface of the PTFE rub strips with the waterproof silicon carbide abrasive paper (Material No.V05-081) . Refer to V2500 NSRM 543000 general repairs.
(5) Clean the faying surface of the new PTFE rub strips with the solvent (Material No.V01-393D) or the solvent (Material No.V01-438) and a lint free cloth (Material No.V02-099) . Wipe the surface before the solvent becomes dry.
(6) Mix and prepare the adhesive (Material No.V08-021) or the adhesive (Material No.V08-104) . Refer to the manufacturer's instructions.
(7) Use the adhesive (Material No.V08-021) or the adhesive (Material No.V08-104) to bond the rub strips onto the pressure relief door. Refer to the manufacturer's instructions.

Pressure Relief Door ** ON A/C NOT FOR ALL

(8) Apply the adhesive (Material No.V08-021) or the adhesive (Material No.V08-104) to the faying surfaces of the rub strips and the pressure relief door.
(9) Hold the new rub strips in place with the C-CLAMP - LARGE or a similar device until the adhesive has fully cured.

NOTE: Cure the adhesive at room temperature. Refer to the manufacturer's instructions.

5. Close-up
Subtask 78-32-80-410-053-A ** ON A/C NOT FOR ALL

A. Close the pressure relief door. See Sheet 1 of the figure

Pressure Relief Door ** ON A/C NOT FOR ALL

Subtask 78-32-80-440-052-A ** ON A/C NOT FOR ALL

B. Do the re-activation procedure of the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 78-32-80-410-054-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 access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 78-32-80-710-050-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 03:29:50 UTC