Removal of the Vent and Drain Valve

TASK 28-22-43-000-801-A
Removal of the Vent and Drain Valve

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

WARNING: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

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

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

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT AVAILABLE.

ZONE: 315
ZONE: 316
FIN: 5040QM

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 4M (13 FT)-ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING, PLASTIC
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)
98A28007570000	1	ADAPTER - VENT AND DRAIN VALVE, APU

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315	TAIL CONE APU AND ACCESSORY COMPARTMENT
316	TAIL CONE APU AND ACCESSORY COMPARTMENT
315AL, 316AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 52-41-00-010-001-A	Open the APU Doors for Access
Vent and Drain Valve

3. Job Set-up
Subtask 28-22-43-865-050-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	APU/FUEL/BLOW OFF/PUMP	2QC	B14
** ON A/C NOT FOR ALL
121VU	APU/FUEL/BLOW OFF/CTL	1QC	K39
** ON A/C ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/FUEL/PUMP/CTL	3QC	M38
** ON A/C NOT FOR ALL
121VU	APU/FUEL/BLOW OFF/CTL	1QC	P38

Subtask 28-22-43-941-050-A

B. 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) When you do maintenance work on the fuel system you must obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) On the FUEL overhead panel 40VU, make sure that the L TK PUMPS and the R TK PUMPS pushbutton switches are released (the OFF legends are on).
(3) On the APU section of the overhead panel 25VU, make sure that the APU MASTER SW is in the off/released position (the ON legend is off).
(4) Put WARNING NOTICE(S) in position:

on the overhead panel 25VU, to tell persons not to push the APU MASTER SW,
on the FUEL overhead panel 40VU, to tell persons not to operate the fuel system,
on the FIRE panel 20VU, to tell persons not to operate the APU fire extinguishing system.

Subtask 28-22-43-010-050-A

C. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU compartment.
(2) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).

4. Procedure
Subtask 28-22-43-020-050-A

A. Removal of the Vent and Drain Valve (5040QM)
(1) Put a CONTAINER 5 L (1.32 USGAL) below the vent and drain valve (2).
(2) Loosen and remove the blanking plug (3) from the vent and drain valve (2).
(3) Install an 98A28007570000 ADAPTER - VENT AND DRAIN VALVE, APU to the fuel vent and drain valve (2).
(4) Drain the unwanted fuel into the container.
(5) Remove the 98A28007570000 ADAPTER - VENT AND DRAIN VALVE, APU when the fuel is drained.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(6) Cut, remove and discard the lockwire from the vent and drain valve (2).

CAUTION: YOU MUST USE TWO WRENCHES AND HOLD THE COMPONENT WHEN YOU REMOVE/INSTALL THE PIPE COUPLINGS AND/OR UNIONS. THIS PREVENTS DAMAGE TO THE COMPONENT.

(7) Remove the vent and drain valve (2).
(8) Remove and discard the 0-ring (1).

CAUTION: PUT PLASTIC CAPS OR PLUGS ON ALL FUEL AND/OR LUBRICATION SYSTEM COMPONENTS AND LINES. IF YOU USE TAPE, CLOTH, OR METAL CAPS ON THEM, YOU CAN DAMAGE THE APU.

(9) Put PLUG - BLANKING, PLASTIC on the opening of the vent and drain valve (2).

[Rev.10 from 2021] 2026.04.02 06:17:31 UTC