12-11-00
 ALL  ú ú 01 Page 317 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 ú ú ú         ú
ú ú ú ú ú ú ú  S 653-266 (4) Make sure the wingtip pressure relief valves are closed.S 863-273WARNING: MAKE SURE THE EXHAUST OF ADJACENT AIRCRAFT DOES NOT GO INTO A_______FLAMMABLE VAPOR ZONE DURING REFUELING. INJURY TO PERSONS ANDDAMAGE TO EQUIPMENT CAN OCCUR.(5) If an adjacent aircraft is operating its APU, make sure the APUexhasut stream does not go into a flammable vapor zone of yourairplane (for example, the fuel vents orthe area around the fuelingstation and the fueling vehicles).
 (6)  S 653-267For a pressure refuel operation, do these steps:
 CAUTION:_______ ATTACH BONDING CABLES ONLY TO SPECIFIED POINTS ON THE AIRPLANE. INCORRECTLY ATTACHED BONDING CABLES CAN CAUSE SCRATCHES. THESE SCRATCHES CAN CAUSE CORROSION AND CRACKS ON STRESSED PARTS. BONDING CABLES ATTACHED TO COMPOSITE DOORS OR FAIRINGS DO NOT GIVE AN ELECTRICAL BOND.
 (a)  Connect a bonding cable from the fueling source to an approved electrical grounding or bonding connection on the airplane (AMM 20.40.11/201).
 NOTE:____ If the fueling source has a permanently attached grounding/bonding cable, you can use it in this step. You can use the grounding connection immediately outboard of the refuel station to bond the airplane to the fuel truck.
 (b) (c)  Supply the electrical power (AMM 24-22-00/201).If you do not have 115.volt ac power (external power), you can do the pressure refuel operation with electrical power from the airplane battery.
 NOTE:____ This procedure operates the static inverter which supplies the necessary AC voltage to operate the full refuel system with its usual functions. This includes fuel gages and the fuel shutoff system. The only limit during this type of operation is the battery life. Complete the refuel operation as soon as possible. A fully charged battery can operate the refuel system for 15.20 minutes.
 1)  Make sure these circuit breakers on the P6 Main Power Distribution panel are closed: a) INVERTER PWR

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 12-11-00
 ALL  ú ú 01.1 Page 318 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
737-300/400/500MAINTENANCE MANUAL
 b)  INVERTER CONT
 c)  BAT BUS CONT MANUAL
 2)  Set the battery switch to ON.
 3)  Set the standby power swith to BAT.
 ú 
        ú
 WARNING:_______ OBEY THE PROCEDURES FOR OPERATING THE APU DURING THE
 ú  FUELING OPERATION.  INJURY TO PERSONS AND DAMAGE TO
 ú  EQUIPMENT CAN OCCUR.
 ú
 ú  (d)  If the APU is operating during refueling, do these steps:
 ú  1)  Obey the limits for the operation of the APU
 ú  (AMM 49-11-00/201).
 ú  2)  You can start the APU during refueling if the start is an
 ú  initial start or a restart after normal shutdown.
 ú  3)  You can shut down the APU (manual or automatic) during the
 ú  refueling operation.
 ú 
        ú
 WARNING:_______ DO NOT START THE APU AGAIN DURING THE REFUELING
 ú  OPERATION IF THERE IS A PROTECTIVE AUTOMATIC SHUTDOWN
 ú  OF THE APU OR A FAILURE TO START CONDITION.  INJURY
 ú  TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 ú
 ú  4)  If there is a protective automatic shutdown or failure to
 ú  start condition on the APU, do one of these steps:
 ú  a)  Complete the refueling operation before you try to
 ú  start the APU again.
 ú  b)  Stop the refueling operation and disconnect the fuel
 ú  hoses from the adapter before you try to start the APU
 ú  again.
 ú 
        ú
 WARNING:_______ DO THESE STEPS IF AN APU FIRE OCCURS DURING
　
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