(2)
AMM 28-23-00/201, Defueling
C. Access
(1) Location Zones
305 Left Fuel Tank
405 Right Fuel Tank
D. Procedure
S 863-020
(1) If you must operate the refuel quantity indicators during the overwing refuel operation, you can use external power.
NOTE: Do not operate the APU during overwing refueling.
____
(a) Make sure the tanks have the necessary quantity of fuel.
S 863-022
WARNING: MAKE SURE THE AIRPLANE AND THE FUEL TRUCK ARE CORRECTLY
_______
GROUNDED. AN EXPLOSION CAN OCCUR.
(2) Ground the airplane and the fuel truck (AMM 20-40-11/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 943-023 WARNING: DO NOT REMOVE THE FILLER CAPS BEFORE YOU GROUND THE FUEL
_______ NOZZLES. A FIRE OR AN EXPLOSION CAN OCCUR.
(3) Ground the refuel nozzles to the ground jacks adjacent to the fill ports with the nozzle bonding cable.
S 033-024 CAUTION: MAKE SURE THE FUEL LEVEL IS BELOW THE LEVEL OF THE CAP BEFORE
_______ YOU REMOVE THE CAP. FUEL CAN FLOW FROM THE PORT TO THE SURFACE OF THE WING.
(4)
Remove the caps from the overwing fill ports in the No. 1 tank and the No. 2 tank (Fig. 301).
S 653-025
(5)
Put the refuel nozzles into the overwing fill ports. S 653-026
(6)
Fill the No. 1 tank and the No. 2 tank with fuel. S 653-027
CAUTION:_______OBEY ALL OF THE LOAD SPECIFICATIONS AND LIMITS. DAMAGE TO THE AIRPLANE CAN OCCUR.
(7)
If you are scheduled to refuel the center tank, move fuel from the other tanks (AMM 28-23-00/201).
S 653-028
(8)
Fill the No. 1 tank and the No. 2 tank with fuel again to replace the quantity that you moved to the center tank.
S 033-029
(9)
When the necessary quantity of fuel is in the tanks, remove the refuel nozzles from the overwing fill ports.
S 433-030
(10)
Install the caps on the overwing fill ports. S 033-031
(11)
Disconnect the refuel nozzles from the ground jacks.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
OVERWING
FILL PORTS
SEE A
FILLER CAP
HANDLE
LANYARD
OVERWING FILL PORT
RETAINING NUT SEAL RING
O-RINGS
OVERWING FILL PORT A
Overwing Fill Ports Figure 301
M50553
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A
737-300/400/500MAINTENANCE MANUAL
S 093-032
(12)
Remove the ground cables for the fuel truck.
S 093-033
(13)
Remove the ground cables for the airplane.
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