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NON-NORMAL PROCEDURES
CONFIG Indication
The CONFIG indicator will annunciate if center tank fuel exceeds 1600 pounds (800 kilograms) and the center tank fuel pump switches are OFF or are producing low pressure. Do not accomplish the CONFIG non-normal procedure prior to or during takeoff with less than 5000 pounds (2300 kilograms) of fuel in the center tank. Do not accomplish the CONFIG non-normal procedure during descent and landing with less than 3000 pounds (1400 kilograms) of fuel in the center tank.
Pump Failure
If one center tank fuel pump fails with fuel in the center tank, position the failed pump OFF. Open the crossfeed valve to prevent a fuel imbalance. The remaining center tank fuel pump may remain ON until the center tank fuel quantity reaches approximately 1000 pounds (500 kilograms). The center tank fuel pump switch must be turned OFF at the first indication of fuel pump low pressure, i.e., Master Caution and FUEL system annunciator lights illuminated, any time during the flight.
NOTE: The fuel crossfeed valve must be closed for landing.
Fuel LOW Indication
In a low fuel non-normal situation, both center tank fuel pumps may be selected ON and all center tank fuel may be used regardless of the amount of fuel remaining in the tank.
ADDITIONAL INFORMATION
Fuel Loading
For the time period that AD 2002-19-52 and AD 2002-24-51 are in effect, the zero fuel gross weight of the airplane plus the weight of center tank fuel may exceed the maximum zero fuel gross weight by up to 5000 pounds (2300
Flight Crew Operations Manual Bulletin No. SHZ-29 R3, dated July 07, 2003 (continued)
kilograms) for takeoff, climb and cruise, and up to 3000 pounds (1400 kilograms) for descent and landing, provided the effects of balance (CG) have been considered.
Ground Procedures - Defueling and Fuel Transfer
When defueling center or main wing tanks, monitor the Fuel Pump Low Pressure indication lights and position fuel pumps OFF at the first indication of fuel pump low pressure. Defueling with passengers on board is prohibited.
NOTE: The following defueling and fuel transfer procedures may be used in lieu of the above per FAA Approval Letters 140S-02-376 and 140S-02-363.
Prior to transferring fuel or defueling, conduct a lamp test of the respective fuel pump LOW PRESSURE lights. When transferring fuel or defueling from either the center or main wing tanks, monitor the fuel pump LOW PRESSURE lights and turn the fuel pumps OFF at the first indication of fuel pump low pressure. Fuel may be transferred from tank to tank or the aircraft may be defueled with passengers on board, provided the fuel quantity in the tank from which fuel is being taken is maintained at not less than 2000 pounds (900 kilograms). Deplane all passengers and non-essential crew when defueling or transferring fuel from a tank that has a fuel quantity less than 2000 pounds (900 kilograms). Wait until the process has been completed and the respective fuel pumps turned OFF before reloading non-essential crew and passengers.
Operating Instructions (Alternate Operating Instructions)
These procedures have been approved by the FAA as a Alternative Method of Compliance (AMOC) to AD 2002-24-51 per FAA Approval Letter 140S-03-189. These procedures may be used in lieu of the original procedures for those airplanes in which the center tank fuel pumps have been inspected via an approved inspection process to ensure proper wire bundle positioning.
NORMAL PROCEDURES
The center tank fuel quantity indication system must be operative to dispatch with fuel in the center fuel tank.
The center tank fuel pump switch(es) must be turned OFF at the first indication of fuel pump low pressure any time during the flight. This includes LOW PRESSURE indications that may occur as a result of pitch attitude changes.
Takeoff and Initial Climb
Both center tank fuel pump switches must be OFF for takeoff if center tank fuel is less than 5000 pounds (2300 kilograms) with the airplane readied for initial taxi. Both center tank fuel pumps should be repositioned ON above 10,000 feet or after the pitch attitude has been reduced to begin acceleration to a climb speed of 250 knots or greater, if more than 2000 pounds (950 kilograms) remain in the center tank.
Flight Crew Operations Manual Bulletin No. SHZ-29 R3, dated July 07, 2003 (continued)
Climb and Cruise
Turn one center tank fuel pump switch OFF during climb or cruise when the center tank fuel quantity reaches approximately 2000 pounds (950 kilograms). Open the crossfeed valve to minimize fuel imbalance. When the Master Caution and FUEL system annunciator lights illuminate, turn the remaining center tank fuel pump switch OFF without delay and close the fuel crossfeed valve. The fuel crossfeed valve must be closed for landing.
Descent
Turn one center tank fuel pump switch OFF at the beginning of the descent if less than 3000 pounds (1400 kilograms) of fuel remain in the center tank. Open the crossfeed valve to minimize fuel imbalance. When the Master Caution and FUEL system annunciator lights illuminate, turn the remaining center tank fuel pump switch OFF without delay and close the fuel crossfeed valve. If an extended period of level flight is required prior to approach and landing, i.e., holding, and fuel remains in the center tank, a single center tank fuel pump switch may be re-positioned ON if both fuel pumps were previously turned OFF. The fuel crossfeed valve should be opened to prevent fuel imbalance. At the first indication of pump low pressure, the fuel pump must immediately be turned off and the fuel crossfeed valve must be closed. The fuel crossfeed valve must be closed for landing.
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737NG机组操作手册Flight Crew Operations Manual FCOM 1(29)
