AD 2009-16-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes |
Unsafe Condition
A failure mode has been identified that can lead to loss of a nose wheel. Any combination of excessive wear and/or adverse tolerances on the axle inner cone, outer cone or wheel hub splined sleeve cones can result in the loss of the critical gap between the inner flange face of the wheel outer cone and the axle end face. If this gap is lost, it can result in the wheel having free play along the length of the axle. This condition, if not corrected, can result in breakage of the wheel nut lock plate leading to unscrewing of the wheel retention nut and subsequent separation of the nose wheel from the landing gear axle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the lock plate for damage (including excessive wear) and cracking, inspect the wheel nut for damage, and measure the gap between the inner flange of the outer cone and the end face of the axle to determine if parts are worn. Replace the lock plate with a new or serviceable part if any damage or cracking is found. Replace any damaged wheel nut with a new or serviceable part. Replace worn parts with new or serviceable parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 3 months after the effective date of this AD
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Affected Aircraft
BAE Systems (Operations) Limited Model Jetstream 4101 airplanes, certificated in any category, all models, all serial numbers.
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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