AD 2000-24-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | 35 | Airworthiness Directives; Learjet Model 35, 35A, 36, and 36A Series Airplanes |
Unsafe Condition
Lack of procedures in the Airplane Flight Manual (AFM) for donning flightcrew oxygen masks when the cabin altitude warning horn is activated, which could lead to incapacitation of the flightcrew due to lack of oxygen and consequent loss of control of the airplane.
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Required Actions
Revise the Airplane Flight Manual (AFM) to add procedures for donning the flightcrew oxygen masks when the cabin altitude warning horn is activated.
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Compliance Time
Before further flight
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Affected Aircraft
All Learjet Model 35, 35A, 36, and 36A series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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