(11)
Remove the electrical power if it is not necessary for other tasks (AMM 24-22-00/201).
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28-15-21
ALL ú ú 02 Page 405 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
FUEL SCAVENGE FLOW INDICATOR/CHECK VALVE - REMOVAL/INSTALLATION
_______________________________________________________________
1. General_______
A. This procedure has two tasks:
(1)
A task to remove the check valve (flow indicator) for the fuel scavenge system
(2)
A task to install the check valve (flow indicator) for the fuel scavenge system.
B. The check valve (flow indicator) for the fuel scavenge system is in the No. 1 tank. It is necessary to defuel the tank to get access to the check valve. It is also necessary to extend the leading edge flaps to get access to the parts that attach the check valve to the airplane.
TASK 28-15-31-004-001
2. Fuel Scavenge Flow Indicator/Check Valve Removal (Fig. 401)________________________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
27-81-00/201, Leading Edge Flaps
(3)
28-10-00/201, Fuel Storage
(4)
28-11-11/401, Wing Fuel Tank Access Panels
(5)
28-23-00/201, Defueling
B. Access
(1)
Location Zone
303 Left Wing Inboard Leading Edge
305 Left Fuel Tank
(2)
Access Panels
7202 Fuel Tank Access Door
C. Procedure
S 864-002
(1) Connect the external electrical power if it is not connected (Ref 24-22-00/201).
S 864-003
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Extend the leading edge flaps (Ref 27-81-00/201).
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AIRPLANES WITH FUEL FLOW INDICATOR/CHECK ú 28-15-31
VALVE ú
ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 401Jul 15/91
A 737-300/400/500MAINTENANCE MANUAL
FUEL BOOST
Fuel Scavenge Flow Indicator/Check Valve Installation
Figure 401
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AIRPLANES WITH FUEL FLOW INDICATOR/CHECK ú 28-15-31
VALVE ú
ú 01 Page 402
ú Mar 15/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 494-004
WARNING:_______ YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO
INSTALL THE LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE
QUICKLY IF YOU DO NOT INSTALL THE SAFETY LOCKS CORRECTLY. THIS
CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Install the flap locks on the leading edge flaps (Ref 27-81-00/201).
S 654-005
WARNING: CAREFULLY DO ALL THE SAFETY PROCEDURES TO DEFUEL AND TO PREPARE
_______ TO GO INTO THE TANK. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(4)
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