28-15-00
ALL ú ú 01 Page 507 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 975-039
(13) Calculate, the quantity of fuel transferred from the center tank to the left main tank by the fuel scavenge system.
(a) Subtract QTY #1 from QTY #2.
(b) Make sure that between 300 and 400 LBS (137 and 182 KGS) was
transferred from the center tank to the left main tank.
NOTE:____ This shows that fuel flow occurs.
S 715-041
(14) Wait, 10 minutes.
(a) Write down the left main tank fuel quantity indication.
NOTE: This quantity for the left main tank will be
____ referred to as QTY #3.
S 975-040
(15) Calculate the fuel transfer from the center tank to the left main tank after closure of the fuel scavenge shutoff valve.
(a) Subtract QTY #2 from QTY #3.
S 715-066
(16) Make sure that the fuel quantity transferred from the center tank after closure of the shutoff valve is less than zero |44 LBS (|20 KGS).
NOTE: The tolerance is to allow for normal steady state fuel
____ quantity gage fluctuation.
S 715-042
(17)
Set the switch for the FWD boost pump for the No. 1 tank to OFF.
S 865-043
(18)
Remove the electrical power, if it is not necessary for other tasks (AMM 24-22-00/201).
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28-15-00
ALL ú ú 01 Page 508 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
FUEL SCAVENGE JET PUMP - REMOVAL/INSTALLATION
_____________________________________________
1. General
_______
A. This procedure has two tasks:
(1)
The removal of the jet pump for the fuel scavenge system
(2)
The installation of the jet pump for the fuel scavenge system.
B. The jet pump for the fuel scavenge system is in the No. 1 tank. It is necessary to defuel the No. 1 tank to get access to the jet pump. It is also necessary to extend the leading edge flaps to get access to the parts that attach the pump to the airplane.
TASK 28-15-11-004-001
2. Fuel Scavenge System Jet Pump Removal (Fig. 401)
_____________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 27-81-00/201, Leading Edge Flaps
(3)
AMM 28-10-00/201, Fuel Storage
(4)
AMM 28-11-11/401, Wing Fuel Tank Access Panels
(5)
AMM 28-23-00/201, Defueling
B. Access
(1)
Location Zones
303 Inboard Leading Edge
305 Left Fuel Tank
(2)
Access Panels
7202 Fuel Tank Access Door
C. Prepare to Remove the Jet Pump
S 864-002
(1) Connect the external electrical power, if it is not connected (AMM 24-22-00/201).
S 864-019
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAPS. THE FLAPS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) Extend the leading edge flaps (AMM 27-81-00/201).
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 locks on the leading edge flaps (AMM 27-81-00/201).
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