This HILLER UH-12B airframe/engine combination has 23 current type-applicable Airworthiness Directives (25 airframe, 0 engine) and 2 historical. AD applicability is type-based — compliance status for N172SM must be verified against the aircraft maintenance logbooks.
Search FAA DRS for applicable ADs →N172SM is one of 42 HILLER UH-12B aircraft on the U.S. registry · fleet median year 1953.
1 possible NTSB record match for N172SM — see verification below.
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