AD 2021-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes |
Unsafe Condition
The strake attachment brackets and surrounding structure failing at the upper most bracket bolt hole, which could result in airplane flutter and reduced lateral stability, which may lead to loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the fuselage strakes for movement, the strakes and their attachment brackets for loose and missing bolts and screws and structural deformation, and the strake attachment brackets and surrounding structure for discoloration, deformation, cracks, and other structural damage. Replace components and repair damage if necessary.
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Compliance Time
Within 10 hours time-in-service (TIS) after the effective date of this AD and thereafter at intervals not to exceed 150 hours TIS.
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Affected Aircraft
Pilatus Aircraft Ltd. Model PC-12/45, PC-12/47, and PC-12/47E airplanes, all serial numbers, certificated in any category, with a Spectre Lift Platform System installed in accordance with Supplemental Type Certificate No. SA00634DE.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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