AD 2009-18-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; 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 |
| aircraft | Aviat | Various | Airworthiness Directives; 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 |
Unsafe Condition
Corrosion, wear, and cracks in the upper wing strut fittings, potentially leading to loose or non-rotating spherical bearings, can cause the joint to malfunction and develop fatigue cracks. Undetected issues could result in failure of the upper attachment fitting, wing structure failure, and loss of aircraft control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the upper wing strut fittings for cracks, wear, and corrosion using eddy current and visual methods. Examine the spherical bearing and replace any cracked fittings. Follow the procedures in Pilatus PC-6 Service Bulletin No. 57-005, REV No. 2, and Chapter 57-00-02 of the Pilatus PC-6 Aircraft Maintenance Manual, dated November 30, 2008.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 1,100 flight hours or 12 calendar months, whichever occurs first, for repetitive inspections. Follow-on actions may require additional time and parts.
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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, manufacturer serial numbers 101 through 999 and 2001 through 2092, certificated in any category.
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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