AD 85-25-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 425 | Airworthiness Directives; Cessna Models 425 and 441 Airplanes |
| aircraft | Cessna Aircraft Company | 441 | Airworthiness Directives; Cessna Models 425 and 441 Airplanes |
Unsafe Condition
Failure of the horizontal stabilizer front spar attachments due to the use of Cessna P/N NAS1291-8 nuts.
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Required Actions
Replace left and right horizontal stabilizer front spar attach bolt retaining nuts (Part Number NAS1291-8) per Cessna Service Bulletin CQB85-25, Rev 1. Return removed nuts to Cessna as specified in the same service bulletin.
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Compliance Time
within the next ten hours time-in-service
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Affected Aircraft
Cessna Models 425 (Serial Numbers 425-0002 thru 425-0236) and 441 (Serial Numbers 441-0001 thru 441-0354)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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