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

When are jettison pumps displayed on the fuel synoptic system?

1. Always displayed

2. Only when jettison is armed

3. When fuel levels are low

4. When there is a fuel imbalance

The correct answer is: Only when jettison is armed

Jettison pumps are displayed on the fuel synoptic system only when the jettison is armed. This is because the system is designed to provide pilots with essential information about the fuel management process, particularly when it is operational and set to allow fuel jettisoning. When the jettison is armed, it indicates that the aircraft is in a state where fuel may need to be released to reach a safe landing weight, therefore the relevant systems and settings become critical for personnel to monitor. In contrast, the options related to displaying jettison pumps under conditions such as low fuel levels or fuel imbalance are not applicable to the specific operational context of jettisoning fuel. These factors do not trigger the visual indicators for jettison pumps; instead, they may be associated with different alerts or displays that highlight fuel management issues. By focusing exclusively on when the jettison function is armed, the system ensures that pilots have immediate and clear information to manage fuel during critical phases of flight.