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AD/B747/283 - Fuel Tank Limitations
Model 747-400, -400D, and -400F CERTIFICModel 747-400, -400D, and -400F CERTIFICATE LIMITATIONS
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Model 747-400, -400D, and -400F CERTIFICATE LIMITATIONS
Fueling and use of the horizontal stabilizer tank (if installed) is prohibited.
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.