Installation of the Primary and Secondary Fuel- Nozzle (131-9(A))

TASK 49-31-41-400-003-A
Installation of the Primary and Secondary Fuel- Nozzle (131-9(A))

WARNING: WHILE THE APU OPERATES, DO NOT GO INTO THESE AREAS:

THE AREA BEHIND THE APU EXHAUST DUCT: 25m (82ft.) REARWARD OF THE DUCT, MORE THAN 3m (10ft.) ABOVE THE GROUND, AND THE WIDTH OF THE HORIZONTAL STABILIZER
THE AREA AROUND THE APU AIR-INTAKE: 2m (7ft) AROUND THE INTAKE
THE AREA OF THE OIL-COOLER OUTLET.

THERE IS A RISK OF INJURY IF YOU GO INTO THESE AREAS.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	Torque wrench: range to between 111.1 and 90.9 lbf.in (1.26 and 1.03 m.daN )
No specific	Torque wrench: range to between 0.748 and 0.612 m.daN (66.19 and 54.16 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
2	PACKING	AIPC 49-31-09-01-070

E. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-860-008-A	APU Start by External Power
TASK 49-00-00-860-008-A-01	APU Start by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (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
Fuel Nozzles and Manifolds

3. Job Set-up
Subtask 49-31-41-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001)
(2) On the panel 25VU, make sure that the APU MASTER SW p/bsw 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 SW 11LJ is set to the ON position.

Subtask 49-31-41-865-057-A ** ON A/C NOT FOR ALL

B. Open, safety and tag 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

4. Procedure
Subtask 49-31-41-420-057-A ** ON A/C NOT FOR ALL

A. Installation of the Nozzles
(1) Apply Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the bolts (5).
(2) Position the new AIPC 49-31-09-01-070 PACKING (2) on the nozzle (3).
(3) Position the air shroud (1) in the combustor port.

NOTE: Make sure that the alignment hole in the air shroud is correctly aligned over the alignment pin of the fuel nozzle.

(4) Position the nozzle (3) into the air shroud (1).
(5) Install the bolts (5).
(6) TORQUE the bolts (5) to between 0.748 and 0.612 m.daN (66.19 and 54.16 lbf.in )

.
(7) Install the locking plate (6) and secure with safety pins (7).
(8) Remove the PLUG-BLANKING from each disconnected line end.
(9) Install the manifold connectors (4) to the fuel nozzle (3).
(10) TORQUE the manifold connectors to between 111.1 and 90.9 lbf.in (1.26 and 1.03 m.daN )

.
(11) Install the fuel supply pipes for the primary manifold (10) and the secondary manifold (8) to the flow divider (9).
(12) TORQUE the fuel supply pipe connectors to between 111.1 and 90.9 lbf.in (1.26 and 1.03 m.daN )

Subtask 49-31-41-865-058-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 49-31-41-790-052-A ** ON A/C NOT FOR ALL

C. Leak Test
(1) Start and operate the APU for a minimum of five minutes (Ref. AMM TASK 49-00-00-860-008).
(2) Stop the APU (Ref. AMM TASK 49-00-00-860-009).
(3) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(4) Examine the fuel nozzles and manifolds for signs of fuel leakage.

NOTE: No leaks are permitted.

5. Close-up
Subtask 49-31-41-410-053-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 SW 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).

Subtask 49-31-41-860-058-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:43:00 UTC