AD 2011-25-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; BAE Systems (Operations) Limited Airplanes |
Unsafe Condition
Passenger/crew entry door pin-guide plates can fail prior to the expected fatigue life due to exfoliation corrosion. The current inspection regime is not adequate to identify early stages of this corrosion.
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Required Actions
Within 6 months after the effective date, perform an ultrasonic inspection of the passenger/crew door upper and lower guide plates for a split caused by exfoliation corrosion. Repeat the inspection every 48 months. If a split of 78mm² (0.12 in.²) or greater is found, replace the affected guide plates with a serviceable one before further flight.
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Compliance Time
Within 6 months after the effective date
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Affected Aircraft
All BAE Systems (Operations) Limited Model 4101 airplanes, 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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