C. Wiring Removal Procedure
S 866-034
(1)
Set the switches for the fuel boost pumps (on the pilots overhead panel) to the OFF position.
S 866-035
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) BOOST PUMP TANK 1 FWD
2) BOOST PUMP TANK 2 FWD
3) BOOST PUMP TANK 1 AFT
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A 737-300/400/500MAINTENANCE MANUAL
ú 4) BOOST PUMP TANK 2 AFT 5) BOOST PUMP CTR TANK LEFT 6) BOOST PUMP CTR TANK RIGHT
S 866-036
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS. THE LEADING EDGE AND THE TRAILING EDGE CONTROL SURFACES CAN EXTEND AND RETRACT QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Extend the leading edge flaps (AMM 27-81-00/201).
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.
(a) Install the flap locks on the leading edge flaps (AMM 27-81-00/201).
S 016-038
(4) Remove these access panels for access to the fuel boost pumps (AMM 57-30-11/401):
(a)
Panel 7203 (Tank No. 1)
(b)
Panel 7201 (Center tank, left pump)
S 016-005
(5) Do these steps for the aft fuel boost pump for the No. 1 tank and for the left fuel boost pump for the center tank:
NOTE: To improve your access to the wiring, you can remove the
____ fuel boost pump (AMM 28-22-41/401). But the procedure to install the pump will cause additional work. A special bonding resistance meter is necessary to install the pump. (Refer to SWPM 20-20-00, Test Procedures for Electrical Bonds, Conditions for Bond Tests in an Explosion Hazard Area).
(a)
Disconnect the electrical connector from the fuel boost pump.
(b)
Disconnect the wire clamps from the wiring.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
(c)
Remove the wires, with the socket contacts attached, from the electrical connector (SWPM 20-61-11). 1) Keep the electrical connector if it does not have damage.
(d)
Tie a string (lacing tape or equivalent) to the end of the wiring.
(e)
Put tape (as necessary) on the end or the wires and socket contacts so that they will go smoothly through the conduit.
NOTE: Use a string that is approximately 15 feet long.
____ Attach the end of the string (that is not attached to the wiring) to the pump or the airplane so you will not accidentally pull it through the conduit.
NOTE: If your airplane has a single ground wire in
____ addition to the three conductor cable, then pull the ground wire out of the electrical conduit before you pull the three conductor cable out.
S 016-004
(6) Do these steps at the front spar:
(a)
Hold the large hex nut that is on the conduit at the front spar with a wrench.
(b)
Disconnect the elbow from the front spar of the wing.
NOTE: It is recommended that you do not try to remove the
____ nut and grommet from the end of the elbow. If you remove the nut, it is possible to break the elbow.
(c) Carefully pull the wiring out of the conduit.
D. Wiring Inspection Procedure
S 216-076
(1) If the Teflon sleeve is installed on the wiring (SB 28A1120 Rev 3), look carefully to make sure that there are no holes in the Teflon sleeve.
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