AD 99-21-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dassault Aviation | FALCON 2000 | Airworthiness Directives; Dassault Model Falcon 2000 Series Airplanes |
Unsafe Condition
Unintended disengagement of the engine cowl hooks during ground maintenance could result in in-flight loss of the engine cowl from the airplane and possible damage to the airplane and persons or property on the ground.
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Required Actions
Within 6 months after the effective date, perform a detailed visual inspection for interference between the safety-lock hooks and upper cowls and trim edges if clearance is outside limits; modify attachment supports of the inner locking hooks; and inspect lower engine cowl safety-lock hooks for proper operation and clearance, performing corrective actions as specified.
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Compliance Time
Within 6 months after the effective date
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Affected Aircraft
Dassault Model Falcon 2000 series airplanes, serial numbers 2 through 72 inclusive, except those with modification M1486 accomplished.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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