Purge and Vent the Fuel Tanks for Maintenance

TASK 28-10-00-910-004-A
Purge and Vent the Fuel Tanks for Maintenance

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: YOU MUST OBEY ALL THE SAFETY PROCEDURES WHEN YOU DO WORK IN OR NEAR THE FUEL TANK. IF YOU DO NOT OBEY THE SAFETY PROCEDURES, THERE IS A RISK OF:

DEATH OR INJURY TO PERSONS
DAMAGE TO THE AIRCRAFT OR OTHER EQUIPMENT.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
PA1V1	1	PURGE AIR KIT
PRG002AKH	1	UNIT, PURGE AIR - 1 AKH CONTAINER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 12-34-24-869-001-A	Aircraft Bonding and Grounding (Earthing) for the Refuel/Defuel or Oxygen Servicing Operations
TASK 12-34-24-869-002-A	Aircraft Grounding (Earthing) for the Maintenance Operations
TASK 12-34-24-869-002-A-01	Aircraft Grounding (Earthing) during Transit, Turnaround or Overnight Stop
TASK 24-38-51-000-001-A	Removal of the Battery
TASK 24-38-51-400-001-A	Installation of the Battery
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 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-004-A	To Remove Collected Fuel from the Center Tank
TASK 28-25-00-650-005-A	To Drain the Remaining Fuel from the Additional Center Tank (ACT)
TASK 57-17-11-000-002-A	Removal of the Access Door at RIB1
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-000-005-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
TASK 57-27-11-400-005-A	Installation of the Access Panel
TASK 57-27-11-400-005-B	Installation of the Access Panel
TASK 57-27-11-400-005-C	Installation of the Access Panel
TASK 57-27-11-400-005-D	Installation of the Access Panel
TASK 57-27-11-400-005-E	Installation of the Access Panel

3. Job Set-up
Subtask 28-10-00-941-057-A

A. Safety Precautions

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) You must obey the fuel safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Put the WARNING NOTICE(S) around the aircraft to tell personnel that the fuel tanks are open.
(4) Do not use the purge-air system during electrical storms.
(5) The purge-air modules must be grounded before use.
(6) Only competent trained persons must operate all equipment contained within the purge-air modules in accordance with its manufacturer's instructions.

Subtask 28-10-00-860-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Make sure that the aircraft is electrically grounded (Ref. AMM TASK 12-34-24-869-001).
(4) Make sure that all the access platforms and related equipment(s) are electrically bonded (Ref. AMM TASK 12-34-24-869-002).
(5) Disconnect the electrical ground power unit.
(6) Disconnect the aircraft batteries to isolate the aircraft electrical power (Ref. AMM TASK 24-38-51-000-001) but do not remove them.
(7) Drain the remaining fuel from the applicable tank(s) (Ref. AMM TASK 28-25-00-650-003) and (Ref. AMM TASK 28-25-00-650-004).

Subtask 28-10-00-860-052-B ** ON A/C NOT FOR ALL

Subtask 28-10-00-010-056-A

C. Get Access
(1) Put the ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE in position.
(2) Remove the applicable access panels (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-17-11-000-002), (Ref. AMM TASK 57-27-11-000-005) and (Ref. AMM TASK 28-10-00-910-002).

4. Procedure
Subtask 28-10-00-869-052-A

A. Purge and Vent the Fuel Tanks for Maintenance
(1) Drain the remaining fuel and vent the fuel tanks with the PRG002AKH UNIT, PURGE AIR - 1 AKH CONTAINER or PA1V1 PURGE AIR KIT:

NOTE: You can also use PRG224 (MODULAR PURGE AIR SYSTEM) as an alternative to the PA1V1 PURGE AIR KIT.

(a) Refer to the manufacturer's instructions to operate the tool.

5. Close-up
Subtask 28-10-00-410-057-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install all the access panels that you removed (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002), (Ref. AMM TASK 57-27-11-400-005).
(3) Remove the access platform(s).

Subtask 28-10-00-860-053-A

B. Aircraft Maintenance Configuration
(1) Connect the aircraft batteries (Ref. AMM TASK 24-38-51-400-001).

Subtask 28-10-00-942-055-A

C. Removal of Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:16:57 UTC