Installation of the Vent and Drain Valve

TASK 28-22-43-400-801-A
Installation 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.

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

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	1	WARNING NOTICE(S)
No specific	Torque wrench: range to between 5.31 and 4.86 m.daN (39.16 and 35.84 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.03QBA1)	Dry lubricant-General Assembly - -
(Material No.08BJP1)	Non Aqueous Cleaner-Turbine Engine Naphtha and hexane -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. 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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	O-RING	AIPC 28-22-04-11-260
1	O-RING	AIPC 28-22-84-11-310

E. Referenced Information

REFERENCE	DESIGNATION
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-22-00-710-001-A	Operational Test of the APU Fuel-Pump System on Ground to Purge the Fuel Line
TASK 49-31-00-710-002-A	Operational Test of the APU Fuel Low Pressure Circuit (APS 3200)
TASK 49-31-00-710-003-A	Operational Test of the APU-Fuel Low-Pressure Circuit ((131-9(A))
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access
Vent and Drain Valve

3. Job Set-up
Subtask 28-22-43-860-050-A

A. Aircraft Maintenance Configuration
(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 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).
(3) 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).
(4) Make sure that the WARNING NOTICE(S) are 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 25VU, to tell persons not to operate the APU fire extinguishing system.

(5) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the APU compartment.
(6) Make sure that the APU access doors 315AL 316AR are open (Ref. AMM TASK 52-41-00-010-001).
(7) Make sure that there is a CONTAINER 5 L (1.32 USGAL) under the vent and drain valve (2).

Subtask 28-22-43-865-051-A

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

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

4. Procedure
Subtask 28-22-43-420-050-A

A. Installation of the Vent and Drain Valve (5040QM).
(1) Clean the component interfaces and the adjacent area.
(2) Make sure that the component interfaces areas are clean and in the correct condition.
(3) Remove the PLUG - BLANKING, PLASTIC from the vent and drain valve (2).
(4) If necessary, clean the threads of the vent and drain valve (2) with the Non Aqueous Cleaner-Turbine Engine Naphtha and hexane - (Material No.08BJP1) . Dry them with a Textile-Lint free Cotton - (Material No.14SBA1) .
(5) Examine the vent and drain valve (2). Make sure that the threads are in the correct condition.

NOTE: Replace the vent and drain valve if you find that the threads are not in the correct condition.

(6) Apply Dry lubricant-General Assembly - - (Material No.03QBA1) on the threads of the vent and drain valve (2).
(7) Apply a layer of Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) on a new AIPC 28-22-04-11-260 O-RING (1) or AIPC 28-22-84-11-310 O-RING (1).
(8) Install the O-ring (1) on the vent and drain valve (2).
(9) Install 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.

(10) TORQUE the vent and drain valve (2) to between 5.31 and 4.86 m.daN (39.16 and 35.84 lbf.ft )

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.

(11) Safety the vent and drain valve (2) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(12) Install the blanking plug (3) on the vent and drain valve (2) and tighten it with your hands.

Subtask 28-22-43-865-052-A

B. Remove the safety clip(s) and the tag(s) and close 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 28-22-43-790-050-A

C. Leak Test
(1) Do the operational test of the APU fuel-pump system on ground to purge the fuel line (Ref. AMM TASK 28-22-00-710-001).
(2) Do the operational test of the APU fuel low pressure circuit

If APU GTCP 36-300 is installed (Ref. AMM D/O 49-31-00-71).
If APU APS3200 is installed (Ref. AMM TASK 49-31-00-710-002).
If APU 131-9(A) is installed (Ref. AMM TASK 49-31-00-710-003).

(3) Examine the connections for leaks.

NOTE: Leaks are not permitted.

5. Close-up
Subtask 28-22-43-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

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