Installation of the Diaphragm in the Aft Cargo Compartment

TASK 26-23-25-400-002-A
Installation of the Diaphragm in the Aft Cargo Compartment

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 150
ZONE: 160
ZONE: 170

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160	BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK
811, 826

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR65
TASK 26-23-00-200-004-A	Check of the Fire Extinguishing Lines of the Two Fire Extinguisher Bottles for Leakage and Blockage
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Diaphragm in the Aft Cargo Compartment

3. Job Set-up
Subtask 26-23-25-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).

Subtask 26-23-25-010-054-C ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 811.
(2) Make sure that the access door 811 is open.
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the AFT cargo-compartment door 826.
(4) Make sure that the AFT cargo-compartment door 826 is open (Ref. AMM TASK 52-30-00-860-001).
(5) Make sure that the CARGO COMPT LIGHT switch 8LU is in the ON position.
(6) Make sure that the partition panel 161DW is removed (Ref. AMM TASK 25-55-12-000-001).

Subtask 26-23-25-865-054-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/CARGO FIRE/EXTIG/BTL2	8WX	C04
49VU	AIR COND/CARGO FIRE/EXTIG/BTL1	1WX	C03

4. Procedure
Subtask 26-23-25-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the Diaphragm
(1) Remove the blanking plugs from the disconnected line ends.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the diaphragm (3) is in the correct condition and has no blockage.
(5) Apply grease:

CAUTION: APPLY A SMALL QUANTITY OF THE CORRECT GREASE TO THE MALE THREADS OF THE CONNECTIONS. THIS WILL PREVENT DAMAGE TO THE THREADS. MAKE SURE THAT GREASE DOES NOT GO INTO THE PIPES. GREASE IN THE PIPES CAN CAUSE A MALFUNCTION OF THE SYSTEM.

(a) Apply a small quantity of Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the male threads of the diaphragm (3).
(6) Put the diaphragm (3) in its installation position and carefully connect the pipes (1).
(7) Hold the diaphragm (3) and tighten the nuts (2).

Subtask 26-23-25-210-051-A ** ON A/C NOT FOR ALL

B. Test
(1) Do a check of the fire-extinguishing lines for leakage and obstruction, without bottle 4005WX/4015WX (Ref. AMM TASK 26-23-00-200-004).

5. Close-up
Subtask 26-23-25-865-055-A ** ON A/C NOT FOR ALL

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/CARGO FIRE/EXTIG/BTL2	8WX	C04
49VU	AIR COND/CARGO FIRE/EXTIG/BTL1	1WX	C03

Subtask 26-23-25-410-051-C ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the partition panel 161DW (Ref. AMM TASK 25-55-12-400-001).
(3) Set the CARGO COMPT LIGHT switch 8LU to the OFF position.
(4) Close the AFT cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
(5) Close the access door 811.
(6) Remove the access platform(s).

Subtask 26-23-25-862-050-A ** ON A/C NOT FOR ALL

C. Put the aircraft back to its initial configuration.
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:46:21 UTC