When is Number 1 required to initiate a fuel and G check?

The requirement for Number 1 to initiate a fuel and G check following a G-X is rooted in safety and operational considerations within formation flying. During a G-X, or G-Ex, the aircraft experiences increased G forces, which can impact the performance of the aircraft and the physiological status of the pilots.

Conducting a fuel and G check after this maneuver ensures that both the aircraft's fuel state and the pilots' physical readiness are monitored immediately after experiencing the stresses of high-G maneuvers. This timing helps ensure that any potential issues, such as inadequate fuel levels or pilot incapacitation, are identified and addressed promptly, allowing for safe continuation of the flight or appropriate operational decision-making.

In contrast, while checks are important at various times during a flight, the specific requirement to perform them after a G-X emphasizes the need for vigilance immediately following maneuvers that could significantly affect the aircraft and crew.