AD 75-26-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus Aircraft Limited | PC-6/A | Airworthiness Directives; Pilatus Model PC-6/A Airplanes |
Unsafe Condition
Failure of the engine mount to fuselage attachment
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reinforce the U-channel (P/N 6201.992) by installing a steel plate (P/N 112.35.06.337) to each U-channel lug and rework the engine strut heads (P/N 6501.106) in accordance with Pilatus Aircraft Ltd. Service Bulletin No. 83A dated February 1971 or an FAA-approved equivalent.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Pilatus Aircraft Limited Model PC-6/A airplanes up to and including S/N 659 (all variants) with Astazou engine installations manufactured by Pilatus Aircraft Ltd.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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