Document ID: chunk:federal_register_of_legislation:F2006B03176:body:0:p4
Version: federal_register_of_legislation:F2006B03176
Segment Type: other
Provision Reference: 
Character Range: 8706–11584

to engine start.

 Both CWT override/jettison pumps must be selected OFF when either CWT override/jettison fuel pump low pressure light illuminates.

 Warning: Do not reset a tripped fuel pump circuit breaker.

        Warning: Do not cycle the CWT pump switches from ON to OFF to ON with any continuous low pressure indication present.

 Note: The CWT may be emptied normally in an emergency fuel jettison.

     Note: In a low fuel situation, both CWT override/jettison pumps may be selected ON and all CWT fuel may be used.

 If a centre wing tank pump fails with fuel in the centre tank, shut off the affected fuel pump.

 If the main tanks are not full, the zero fuel gross weight of the aeroplane plus the weight of CWT tank fuel may exceed the maximum zero fuel gross weight by up to 7,000 pounds (3,200 kilograms) for takeoff, climb, cruise, descent, and landing, provided that the effects of balance (CG) have been considered.

 AD/B747/280 Annex A (continued)

 When refuelling centre or main wing tanks, the Fuel Pump Low Pressure indication lights must be monitored and the fuel pumps positioned to OFF at the first indication of fuel pump low pressure. Defuelling with passengers on board is prohibited.

AD/B747/280

Annex B

 Certificate Limitations

                                  Fuel Tank Pumps 12/2002 TX

 Model 747-400, -400D, and -400F
 Series Aeroplanes Aircraft Flight Manual Revision

 Fuelling and use of the horizontal stabilizer tank (if installed) is prohibited if a placard prohibiting its use is installed.

 The centre wing tank (CWT) must contain a minimum of 17,000 pounds (7,700 kilograms) prior to engine start, if the CWT override/ jettison pumps are to be selected ON during flight.

 The CWT fuel quantity indication system must be operative to dispatch with CWT mission fuel.

 Both CWT override/jettison pump switches must be selected OFF at or before CWT fuel quantity reaches 7,000 pounds (3,200 kilograms), if CWT fuel quantity is less than 50,000 pounds (22,700 kilograms) prior to engine start. The CWT override pumps may be selected ON during stabilized cruise conditions. Both CWT override/jettison pump switches must be selected OFF at or before the CWT fuel quantity reaches 3,000 pounds (1,400 kilograms).

     Note: With CWT override/jettison pumps selected OFF and CWT fuel quantity greater than 6,000 pounds (2,800 kilograms), the FUEL OVRD CTR L & R EICAS messages will be displayed. Do not accomplish the associated non- normal procedure.

 Both CWT override/jettison pump switches must be selected OFF at or before CWT fuel quantity reaches 3,000 pounds (1,400 kilograms), if CWT fuel quantity is greater than or equal to 50,000 pounds (22,700 kilograms) prior to engine start.

 Both CWT override/jettison pumps must be selected OFF when either CWT override/jettison fuel pump low pressure light illuminates.