AD 95-20-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
| aircraft | Learjet Inc. | 24F-A | Airworthiness Directives; Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes |
Unsafe Condition
Possible failure of the outflow/safety valves, which could result in rapid decompression of the airplane.
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Required Actions
Replace certain outflow/safety valves and revise the Airplane Flight Manual (AFM) Limitations Section to prohibit flight above 41,000 feet. The valve replacement constitutes terminating action for the AFM limitation.
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Compliance Time
Effective November 2, 1995.
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Affected Aircraft
Learjet Model 24, 25, 28, 29, 31, 35, 36, and 55 series airplanes, as specified in Allied Signal Aerospace Alert Service Bulletin 102850-21-A4021 and Learjet service bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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