If the prop advance happens, what is true regarding the power levers during a governor failure?

In the context of governor failure during a prop advance, it's important to understand how the power management of engines functions under such circumstances. When the power management system is compromised, specifically, if the governor fails, the system can no longer automatically adjust engine power and propeller pitch.

If the left lever goes full forward, it is an indication that the system is defaulting to a "maximum power" state for that engine if it's responding to a failure in the governor. This lever position is particularly critical because it allows the pilot to maintain maximum thrust and performance from the operational propeller even when the automatic control system is not functioning. By having the left lever positioned fully forward, this compensates for the governor's failure, ensuring that the aircraft can still achieve necessary performance levels for maneuvering and safety.

In situations where the governor is not regulating power as intended, it is also essential to manually control power levels. However, the left lever going full forward is a specific response that indicates the system's effort to maintain thrust under the circumstances of a failure.