Mag timing check, for dumb guys

[Skymaster337B]

Sounds like you could fight that one...at your expense of course. The FAA's position is that an annual inspection is a visual inspection by nature and ensures conformity only on the day the IA signs it off. That means the owner/operator is responsible for airworthiness after the airplane leaves the IA's hangar. It sounds like that FAA inspector was a jackass.