AD 2012-06-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes |
Unsafe Condition
Loose elevator and rudder hinge bolts caused by incorrect torquing and locking of the bolts, which could lead to in-flight failure of the elevator or rudder attachment.
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Required Actions
Install new elevator and rudder hinge bolt locking screws and modify the installation of the hinge bolt following the Accomplishment Instructions in Pilatus Aircraft Ltd. PC-6 Service Bulletin No. 55-001, Rev. No. 1, dated November 25, 2011. The compliance timeline varies based on whether the airplane has been previously modified.
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Compliance Time
Within 2 months or 6 months after May 4, 2012, depending on modification status.
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Affected Aircraft
Pilatus Aircraft Ltd. Models PC-6, PC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, and PC-6/C1-H2 airplanes, all Pilatus manufacturer serial numbers (MSN), and MSN 2001 through 2092, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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