JRitt
Line Up and Wait
My brother in-law was flying my plane (C172N) and stopped for 1.5hrs (outside temp was ~20deg F dew point ~0deg F). When he did the runup to leave the left mag failed (ran rough and lost ~400rpm). There was a mechanic there (he is lucky like that) and he pulled and cleaned the plugs on the left mag and said they did not look bad and they were probably frosted. The runup was fine after the reinstall and he flew home with a 50kt tail wind.
Can someone explain the cause of frosted plugs?
Can someone explain the cause of frosted plugs?