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

TASK 49-31-42-400-006-A
Installation of the Primary and Secondary Fuel-Manifold (131-9(A))

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 38.5 and 31.5 lbf.in (0.44 and 0.36 m.daN )
No specific	Torque wrench: range to between 1.49 and 1.23 m.daN (131.86 and 108.85 lbf.in )
No specific	Torque wrench: range to between 1.738 and 1.422 m.daN (12.82 and 10.49 lbf.ft )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

C. 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 52-41-00-010-001-A	Open the APU Doors for Access
Manifold - Primary and Secondary-Fuel ** ON A/C NOT FOR ALL
Manifold - Primary and Secondary-Fuel ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 49-31-42-860-058-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 49-31-42-865-062-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 49-31-42-420-056-A ** ON A/C NOT FOR ALL

A. Install the Primary and Secondary fuel manifold assembly.
(1) Install the primary (1) and secondary (2) manifold on the APU.
(2) Connect the manifolds at the fuel nozzles (4) and the fuel flow divider (3).
(3) TORQUE the fittings at the fuel nozzles (4) to between 1.49 and 1.23 m.daN (131.86 and 108.85 lbf.in )

.
(4) TORQUE the fittings at the fuel flow divider (3) to between 1.738 and 1.422 m.daN (12.82 and 10.49 lbf.ft )

Subtask 49-31-42-420-056-B ** ON A/C NOT FOR ALL

.
(4) TORQUE the fittings at the fuel flow divider (3) to between 1.738 and 1.422 m.daN (12.82 and 10.49 lbf.ft )

.
(5) Install the clamp (7) on the secondary (2) manifold.
(6) Install the bolt (5) and the nut (6) to attach the clamp (7) with the clamp (8) installed in the oil scavenge tube.
(7) TORQUE the nut (6) to between 38.5 and 31.5 lbf.in (0.44 and 0.36 m.daN )

5. Close-up
Subtask 49-31-42-410-053-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Set the LIGHT control SW 11LJ to the OFF position.
(2) Close the APU access doors 315AL 316AR.
(3) Remove the access platform(s).

Subtask 49-31-42-865-063-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 49-31-42-860-059-A ** ON A/C NOT FOR ALL

C. 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 01:29:41 UTC