AD Amdt-39-9456
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna | 441 | Airworthiness Directives; Cessna Model 441, 500, 550, and 560 Series Airplanes |
Unsafe Condition
Cracking and subsequent failure of outflow/safety valves in the pressurization system could result in rapid decompression of the airplane.
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Required Actions
Replace the outflow/safety valve in accordance with specified Allied Signal Aerospace Service Bulletins within 18 months after the effective date. Do not install valves with part numbers and serial numbers identified in the service bulletins unless they are serviceable.
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Compliance Time
Within 18 months after the effective date (January 22, 1996)
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Affected Aircraft
Cessna Model 441, 500, 550, and 560 series airplanes equipped with Allied Signal outflow/safety valves, as identified in Allied Signal Service Bulletins 103576-21-4054, 103576-21-4056, and 103648-21-4055.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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