General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

Is it possible to jettison fuel while on the ground?

1. Yes, but only under certain conditions

2. No, because the jettison nozzle valves cannot open

3. Yes, because the system overrides ground restrictions

4. No, due to safety regulations

The correct answer is: No, because the jettison nozzle valves cannot open

The correct answer is that it is not possible to jettison fuel while on the ground primarily because the jettison nozzle valves cannot open. In aircraft design, the fuel jettison system is engineered to prevent operation while the aircraft is on the ground. This is a critical safety feature aimed at minimizing risks associated with fuel spillage or fire hazards on the tarmac. The system includes various interlocks and mechanisms that are activated only when specific airborne conditions are met, ensuring that jettisoning fuel is an aerial activity that can be controlled safely. Other options miss the mark, as some imply that there could be exceptions or override capabilities during ground operations, which is not the case. Safety regulations collectively prevent any form of fuel jettisoning on the ground, reinforcing the idea that aircraft fuel management is critical for operational safety and environmental protection.