AD 2021-23-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | Inc | Airworthiness Directives; Learjet Inc. Airplanes |
Unsafe Condition
Corrosion found on the upper surface of the lower center wing mid spar splice plate, which could result in failure of the wing centerline joint and lead to partial wing separation with consequent loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Repetitively inspect the center wing area for corrosion and deterioration of protective treatments, remove any corrosion, and treat any deteriorated areas.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
Certain Learjet Inc. Model 45 airplanes, serial numbers 45-001 through 45-597.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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