AD 2001-03-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | 45 | Airworthiness Directives; Learjet Model 45 Airplanes |
Unsafe Condition
Fatigue cracking on the anti-ice manifold splitter vanes could result in metal fragments breaking off and blocking a duct in the anti-ice system, leading to an unannunciated loss of ice protection.
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Required Actions
Revise the airplane flight manual (AFM) to prohibit flight into known icing conditions; inspect the anti-ice manifold assembly for missing material and perform corrective actions if necessary; replace the anti-ice manifold assembly with a new assembly; revise the Learjet 45 maintenance program to incorporate additional inspections and maintenance practices for the anti-ice manifold assembly.
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Compliance Time
Within 100 flight hours
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Affected Aircraft
Learjet Model 45 airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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