AD 71-07-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 401 | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 401A | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 401B | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 402 | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 402A | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 402B | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 411 | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
| aircraft | Cessna Aircraft Company | 411A | Airworthiness Directives; CESSNA Models 401, 401A, 401B, 402, 402A, 402B, 411 and 411A Airplanes |
Unsafe Condition
Failure of the emergency exit window could result in loss of structural integrity of the fuselage.
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Required Actions
Modify the emergency exit window in accordance with Cessna Service Letter No. ME70-30 dated August 21, 1970, and Cessna Service Kit SK402-23 dated June 15, 1970, or an equivalent method approved by the FAA. Ensure proper installation of emergency exit window retention pins if the emergency release handle is pulled.
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Compliance Time
Within 50 hours' time in service after the effective date of this AD
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Affected Aircraft
Cessna Models 401 (Serial Numbers 401-0041 and up), 401A (all Serial Numbers), 401B (Serial Numbers 401B0001 thru 401B0052), 402 (Serial Numbers 402-0041 and up), 402A (all Serial Numbers), 402B (Serial Numbers 402B0001 thru 402B0030), 411 and 411A (Serial Numbers 411-0235 and up)
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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