This HILLER UH-12E4 airframe/engine combination has 12 current type-applicable Airworthiness Directives (0 airframe, 13 engine) and 1 historical. AD applicability is type-based — compliance status for N501HA must be verified against the aircraft maintenance logbooks.
Search FAA DRS for applicable ADs →N501HA is one of 7 HILLER UH-12E4 aircraft on the U.S. registry · fleet median year 1966.
1 possible NTSB record match for N501HA — see verification below.
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