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

TASK 49-31-42-000-003-A
Removal 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).

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 3M (10 FT)- ADJUSTABLE
No specific	AR	CONTAINER 10 L(2 1/2 USGAL)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

C. 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 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
Main Fuel Nozzles and Manifold

3. Job Set-up
Subtask 49-31-42-860-054-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(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) Put 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).

Subtask 49-31-42-865-055-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

Subtask 49-31-42-010-054-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control switch 11LJ to the on position.

4. Procedure
Subtask 49-31-42-020-052-A ** ON A/C NOT FOR ALL

A. Removal of Nozzles and Manifold.
(1) Put a CONTAINER 10 L(2 1/2 USGAL) into position below the fuel manifold assembly.
(2) Remove the bolt (6) and the nut (8) from the clamp (7).
(3) Repeat step (1) at the three remaining clamp positions.
(4) Disconnect the fuel manifold connector (4) at the nozzle (2).
(5) Repeat step (3) at the five remaining main nozzle positions.
(6) Disconnect the manifold connector (9) at the fuel flow divider and remove the manifold assembly.
(7) Remove the bolts (3) from the nozzle assembly (2).
(8) Remove the nozzles (2) and the gasket (1) from the mount boss (5).
(9) Discard the gasket (1).
(10) Repeat steps (6) thru (8) at the five remaining main nozzle positions.
(11) Install approved blanking caps to all fuel tube ends and openings.
(12) Remove the container.

[Rev.10 from 2021] 2026.04.01 01:29:36 UTC