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28-22-12
ALL ú ú 01 Page 404 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
ENGINE FUEL SHUTOFF VALVE SWITCH - ADJUSTMENT/TEST
__________________________________________________
1. General_______
A. This procedure has one task, an operational test of the switch for the engine fuel shutoff valve.
B. You must make sure the engine start levers are correctly rigged before you do this task. This is necessary to make sure the fuel system and the ignition system operate correctly together.
C. The switch for the fuel shutoff valve is installed on brackets in pilot's control stand. There is one switch for each start lever. You can get access to the switch for the fuel shutoff valve for the No. 1 engine from the left side of the pilot's control stand. You can get access to the switch for the fuel shutoff valve for the No. 2 engine from the right side of the pilot's control stand.
D. You can do this test procedure for each switch for the fuel shutoff valves or for the two switches together.
TASK 28-22-12-715-001
2. Engine Fuel Shutoff Valve Switch Adjustment/Test (Fig. 501)________________________________________________
A. Equipment
(1) Tape - adhesive, to identify start lever positions
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 76-11-10/501, Engine Start Lever Switches
C. Access
(1) Location Zones
101 Control Cabin Left
102 Control Cabin Right
D. Procedure
S 865-002
(1)
Connect the external electrical power (AMM 24-22-00/201).
(2)
Set the engine start lever in the CUTOFF detent.
S 865-004
(3)
Make sure these circuit breakers are closed:
S 865-003
(a) P6 Main Power Distribution Panel
1) FUEL SHUTOFF VALVE
2) SHUT-OFF VALVE ENG 1
3) SHUT-OFF VALVE ENG 2
S 865-005
(4) Make sure the engine fire switch on the P8 panel is in the NORMAL position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
Engine Fuel Shutoff Valve Switch Adjustment
Figure 501 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-12
ALL ú ú 01 Page 502 ú Mar 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
START LEVER
(POSITION IN CUTOFF DETENT)
MEASUREMENT IS TAKEN AT PERIPHERY OF DETENT PLATE
Engine Fuel Shutoff Valve Switch Adjustment Figure 501 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-12
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 495-006
(5) Put tape on the edge of the detent plate for the start lever at fuel these positions (Fig. 501, Detail C):
(a) Valve-open position 2
NOTE: Valve-open position 2 is 1.8 inches (45.7 millimeters)
____ from the position of the start lever in the CUTOFF detent.
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