Installation of the Main Fuel Nozzles and Manifold (APS 3200)

TASK 49-31-42-400-005-A
Installation of the Main Fuel Nozzles and Manifold (APS 3200)

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

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

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 0.63 and 0.57 m.daN (55.75 and 50.44 lbf.in )
No specific	Torque wrench: range to between 1.19 and 1.07 m.daN (105.31 and 94.69 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03PBB1)	Lubricant-Anti Seize High Temp. -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	GASKETS	AIPC 49-31-04-50-090
1	GASKETS	AIPC 49-31-84-20-090

E. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-860-005-A	APU Start by External Power
TASK 49-00-00-860-005-A-01	APU Start by Batteries
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
Main Fuel Nozzles and Manifold

3. Job Set-up
Subtask 49-31-42-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3) Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(5) Make sure that the access platform is in position below the APU compartment.
(6) Make sure that the APU access doors are open (Ref. AMM TASK 52-41-00-010-001).
(7) Make sure that the LIGHT control switch 11LJ is set to the on position.

Subtask 49-31-42-865-057-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 49-31-42-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Nozzles and Manifold
(1) Remove all the blanking caps.
(2) Install the new AIPC 49-31-04-50-090 GASKETS (1) or AIPC 49-31-84-20-090 GASKETS (1) on the nozzles (2).
(a) Make sure that the polarizing spigot pin is correctly aligned with the mating flat-part location on the combustor-casing mount boss (5).
(3) Install the nozzles (2) with the new gasket (1) in the combustor-casing mount boss (5).
(4) Apply Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the bolts (3).
(5) Install the bolts (3) and secure the nozzles (2).
(6) TORQUE the bolts (3) to between 0.63 and 0.57 m.daN (55.75 and 50.44 lbf.in )

(7) Connect the manifold nuts (4) to the nozzles (2).
(8) TORQUE the manifold nuts (4) to between 1.19 and 1.07 m.daN (105.31 and 94.69 lbf.in )

.
(9) Install the clamps (7) with the bolts (6) and nuts (8).
(10) TORQUE the nuts (8) to between 0.63 and 0.57 m.daN (55.75 and 50.44 lbf.in )

(11) Connect the manifold connector (9) to the fuel flow divider, torque to the same value as in step (8).

Subtask 49-31-42-865-056-A ** ON A/C NOT FOR ALL

B. 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 49-31-42-790-050-A ** ON A/C NOT FOR ALL

C. Test
(1) Start the APU (Ref. AMM TASK 49-00-00-860-005).
(a) Operate the APU for min. five minutes and examine the joints of the main fuel nozzles and the manifold for leaks.

NOTE: Leaks are not permitted.

5. Close-up
Subtask 49-31-42-410-051-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Set the LIGHT control switch 11LJ to the off position.
(3) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

Subtask 49-31-42-860-055-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:29:38 UTC