AD 2009-26-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Quality Aerospace | Various | Airworthiness Directives; Thrush Aircraft, Inc. Model 600 S2D and S2R Series Airplanes |
Unsafe Condition
Fatigue cracking in the wing front lower spar caps, which could lead to wing failure in flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the wing front lower spar caps when they reach their life limit. Retain the repetitive inspections of the 1/4-inch and 5/16-inch bolt hole areas on the wing front lower spar caps for fatigue cracking. Report any fatigue cracks found to the FAA.
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Compliance Time
Within 500 flight hours after the effective date for airplanes that have already exceeded the life limit replacement time. Graduated compliance times of 1,000, 1,500, or 2,000 flight hours for airplanes that have not yet reached the life limit replacement time.
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Affected Aircraft
Thrush Aircraft, Inc. Model 600 S2D and S2R series airplanes, including those previously held by Quality Aerospace, Inc. and Ayres Corporation.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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