SR HNA-HNA-24-0819-03B
在手册中，对于中央油箱油量要求有诸多的限制，且各不相同，为此与波音做了沟通，不同油量究竟是出于什么要求。相关解释如下。
1, FIM 28-22 TASK 801(Center Tank Left Fuel Pump LOW PRESSURE Light is ON – Fault Isolation), it requires a minimum fuel of 14,000 lb (6350 kg) .
- 14,000 lbs. is a minimum amount of fuel required in the center tank to ensure the fuel pump will re-prime and will developed fuel pressure for the test.
2, FIM 28-22 TASK 817(Center Tank, Left Boost Pump Circuit Breaker Open – Fault Isolation), it requires a minimum fuel of 20,000 lb (9072 kg) .
- 20,000 lbs. is to ensure the pump inlets are covered for safety to protect against introducing an ignition source/ electrical short in the fuel tank. Note that FIM 28-22 TASK 817 specifically addresses an open circuit breaker fault.
3, AMM 28-22-41-720-802(Ground Fault Interrupter (GFI) – Operational Test), it requires a minimum fuel of 2000 lb (907 kg) .
- 2,000 lbs. is to ensure the fuel pump will not auto-shutoff.
4, AMM 28-22-00-730-801(Engine Fuel Feed Pumps – Functional Test), it requires a minimum fuel of 1000 lb (454 kg) .
- 2,000 lbs. is to ensure the fuel pump will not auto-shutoff – Note AMM** will be updated from 1,000 to 2,000 lbs of fuel.(This change is scheduled to be incorporated in the 15-Oct-2024 revision of the 737NG AMM.)