All definitions
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Annual (12 months)
VOR Check (30 Days)
100 Hour or Progressive inspection
(required if aircraft is used for hire or flight instruction for hire—91.409(b))
Altimeter (24months 91.411) and
Airworthiness Directives
Transponder (24 months 91.413)
ELT (12 months)
Static inspection (24 months
Source 14 CFR 91.171, 91.207, 91.409, 91.411 and 91.413 · checked 26 Aug 2026