FAA Private Pilot Test Prep

Correct answer: B. 3402.5 hours. The 100-hour inspection is set by the FAA in FAR 91.409 and deals with planes used for hire or flight training. If a plane has to be flown to an inspection point it can be extended 10 hours as long as those hours count as part of the next 100 hours. So in this case, the next 100-hour inspection is due at 3402.5 regardless that it occurred at 3309.5 hours.