Why does the breaker keep tripping when I try to use the flaps in my 1965 Cessna 172G? It’s a 15 amp breaker. After I reset the breaker, the flaps will go up but then the breaker trips when attempting to lower the flaps.
Question: does the breaker open immediately when you command a flap setting, or is it more intermittent ie it occasionally trips when commanding a flap setting? An immediate and instantaneous trip typically indicates a short circuit either in the flap drive motor, the control switch unit or the wiring. Intermittent tripping of the breaker might indicate problems with the flap drive motor i.e. damage to the windings, etc. Either way, the flap system is a secondary flight control and must be functional in order to fly the airplane safely. Therefore cease operation of that aircraft until the flap system can be inspected and repaired by qualified mechanic.