Remove and Carry out Operational Check of Vent Line Check Valves

TASK 28-28-00-710-015-A
Remove and Carry out Operational Check of Vent Line Check Valves

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

FIN: 239QM ** ON A/C NOT FOR ALL
FIN: 240QM ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 282800-61
REMOVE AND CARRY OUT OPERATIONAL CHECK OF VENT LINE CHECK VALVES

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-28-63-000-001-A	Removal of the AFT ACT Vent Check-Valve
TASK 28-28-63-000-002-A	Removal of the FWD ACT Vent Check-Valve
TASK 28-28-63-400-001-A	Installation of the AFT ACT Vent Check-Valve
TASK 28-28-63-400-002-A	Installation of the FWD ACT Vent Check-Valve

3. Job Set-up
Subtask 28-28-00-860-146-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Energize the Ground Service Network (Ref. AMM TASK 24-42-00-861-001).
(3) Put a WARNING NOTICE(S) in position on these panels to tell persons not to operate the refuel/defuel system:

Refuel/Defuel control panel 800/801VU
Fuel control panel 40VU.

Subtask 28-28-00-010-080-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Remove the ACT vent-line check-valves from the center tank (Ref. AMM TASK 28-28-63-000-001) (Ref. AMM TASK 28-28-63-000-002).

4. Procedure
Subtask 28-28-00-200-050-A ** ON A/C NOT FOR ALL

A. Inspection of the ACT Vent-Line Check-Valves
(1) Send the ACT vent-line check-valves to the workshop to do a bench check.
(2) Make sure that the internal sprung flapper of the valve operates correctly.

5. Close-up
Subtask 28-28-00-410-071-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the ACT vent-line check-valves in the center tank (Ref. AMM TASK 28-28-63-400-001) (Ref. AMM TASK 28-28-63-400-002).

Subtask 28-28-00-860-147-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(3) Make sure that the work area is clean and clear of tools and other items.
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:17:51 UTC