Installation of the Combustion Chamber Drain Valve (APS 3200)

TASK 49-32-51-400-001-A
Installation of the Combustion Chamber Drain Valve (APS 3200)

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

REFERENCE	QTY	DESIGNATION
No specific	Torque wrench: range to between 100 and 70 lbf.in (1.13 and 0.79 m.daN )
No specific	Torque wrench: range to between 300 and 270 lbf.in (3.39 and 3.05 m.daN )

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
315AL, 316AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	PACKING	AIPC 49-32-04-50-080
3	PACKING	AIPC 49-32-84-20-080

E. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
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
Drain Valve

3. Job Set-up
Subtask 49-32-51-860-053-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(2) Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(3) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the access platform is in position below the APU compartment.
(5) Make sure that the APU access doors are open (Ref. AMM TASK 52-41-00-010-001).

Subtask 49-32-51-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

4. Procedure
Subtask 49-32-51-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Combustion Chamber Drain Valve.

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.

(1) Lubricate the new AIPC 49-32-04-50-080 PACKING (3) or AIPC 49-32-84-20-080 PACKING (3) with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .
(2) Install the new packing (3) on the drain valve (2).
(3) Install the drain valve (2) in the combustion chamber elbow (4).

NOTE: Make sure that the drain valve is installed with the embossed arrow pointed overboard to the drain tube connector.

(4) TORQUE the drain valve (2) to between 100 and 70 lbf.in (1.13 and 0.79 m.daN )

.
(5) Connect the drain tube (1) to the drain valve (2).

NOTE: When you torque the drain tube nut, hold the drain valve firmly with a wrench to prevent torque transfer.

(6) TORQUE the drain tube nut (1) to between 300 and 270 lbf.in (3.39 and 3.05 m.daN )

5. Close-up
Subtask 49-32-51-865-052-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
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-32-51-410-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:29:59 UTC