AD/B747/283 - Fuel Tank Limitations
Boeing 747 Series AeroplanesBoeing 747 Series Aeroplanes
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Boeing 747 Series Aeroplanes
AD/B747/283 (Continued)
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.
When defueling 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. Defueling with passengers on board is prohibited.