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28-22-31
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A
737-300/400/500MAINTENANCE MANUAL
APU FUEL SHUTOFF VALVE - ADJUSTMENT/TEST
________________________________________
1. General_______
A. This procedure has one task, an operational test of the APU shutoff valve.
TASK 28-22-31-715-001
2. APU Shutoff Valve Operational Test (Fig 501)__________________________________
A. Access
(1) Location Zones
101 Control Cabin Left
102 Control Cabin Right
310 Left Wing Wheel Well
B. Procedure
S 865-015
(1) Make sure this circuit breaker is closed:
(a) P6 Main Power Distribution Panel
1) APU CONT
S 865-016
(2)
Set the battery switch to the ON position.
S 715-017
(3)
Set the APU master switch to the ON position.
(a) Make sure the valve override handle moves to the OPEN position.
S 715-028
(4)
On the engine and APU fire control module on the control stand aft electronic control panel, P8, pull the APU fire handle.
(5)
Make sure the valve override handle moves to the closed position.
S 715-022
(6)
On the engine and APU fire control module on the control stand aft electronic control panel, P8, push the APU fire handle in to the stowed position.
S 715-021
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A 737-300/400/500MAINTENANCE MANUAL
ENGINE NO. 1
WING REAR SPAR SEE B
APU FUEL VALVE SEE A
O-RING UNION WITH HANDLE OVERRIDE MANUAL APU FUEL VALVE
APU FUEL VALVE
A
WING REAR SPAR
MOUNTING SCREW BODY ASSEMBLY
MOUNTING SCREW ACTUATOR
ASSEMBLY VALVE BODY O-RING PLUG ELECTRICAL
ACTUATOR ASSEMBLY MOUNTING ADAPTER
FWD INBD BONDING JUMPER
B
Figure 501 APU Fuel Shutoff Valve
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737-300/400/500MAINTENANCE MANUAL
(7) S 715-023Make sure the valve override handle moves to the open position.
(8) S 715-024On the APU remote fire control panel, P28, on the aft bulkhead of the right main wheel well, pull the APU remote fire handle.
(9) S 715-025Make sure the valve override handle moves to the closed position.
S 715-026
(10)
On the APU remote fire control panel, P28, on the aft bulkhead of the right main wheel well, push the APU remote fire handle to the stowed position.
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