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28-22-11
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(b) Disconnect the electrical power if it is not necessary for other tasks (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-11
ALL ú ú 01 Page 410 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
ENGINE FUEL SHUTOFF VALVE SWITCH - REMOVAL/INSTALLATION
_______________________________________________________
1. General_______
A. This procedure has two tasks:
(1)
A task to remove the switches for the engine fuel shutoff valve
(2)
A task to install the switches for the engine fuel shutoff valve.
TASK 28-22-12-004-011
2. Engine Fuel Shutoff Valve Switch Removal (Fig. 401)________________________________________
A. Consumable Materials
(1) A00737, Masking Tape
B. References
(1) WDM 28-21-01, Engine Fuel Shut-Off Valve
C. Access
(1) Location Zones
101 Control Cabin Left
102 Control Cabin Right
D. Procedure
S 864-002
(1) Open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) FUEL SHUTOFF VALVE
2) SHUT-OFF VALVE ENG 1
3) SHUT-OFF VALVE ENG 2
S 864-003
(2)
Put the start levers in the CUTOFF detent.
S 014-004
(3)
Remove the top and bottom forward panels on each side of the pilot's control stand.
NOTE: The switches for the fuel shutoff valves are installed on
____ brackets on the pilot's control stand. There are two switches, one switch for each start lever. You can get access to the switch for the No. 1 start lever from the LEFT side of the pilot's control stand. You can get access to the switch for the No. 2 start lever from the RIGHT side of the pilot's control stand.
S 034-005
(4) Loosen the terminal screws and disconnect the three wires from the switch (WDM 28-21-01).
(a) Use an adhesive, masking tape that you can write on to make tags to identify each wire, common (C), open (NO), closed (NC), to make it easier to install them again.
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