AD 76-13-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 401 | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 401A | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 401B | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 402 | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 402A | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 402B | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 411 | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 411A | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 414 | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
| aircraft | Cessna Aircraft Company | 414A | Airworthiness Directives; CESSNA Models 401, 402, 411, 414 and 421 Series Airplanes |
Unsafe Condition
Failure of the fork bolt located at the aft end of the main landing gear retraction system torque tube connecting the torque tube to the outboard push/pull tube.
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Required Actions
Replace right and left 1/2-inch diameter fork bolts with new P/N 5243518-3 or FAA-approved superseding part numbers on specified serial ranges. Replace 5/8-inch diameter P/N 5141052-1 fork bolts with new P/N 5141052-1 or FAA-approved superseding part numbers on later serial ranges. Compliance intervals: 200 hours' time in service for initial replacement, then every 2,000 hours for 1/2-inch bolts and every 5,000 hours for 5/8-inch bolts. Life limits may be extended up to 2,025 or 5,025 hours as specified.
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Compliance Time
Within 200 hours' time in service on those airplanes having 1,800 or more hours' time in service or prior to 2,000 hours' time in service on those airplanes having less than 1,800 hours' time in service, and at each subsequent 2,000 hours' time in service thereafter for 1/2-inch bolts; within 200 hours' time in service on those airplanes having 4,800 or more hours' time in service or prior to 5,000 hours' time in service on those airplanes having less than 4,800 hours' time in service, and at each subsequent 5,000 hours' time in service thereafter for 5/8-inch bolts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Models 401 (401-0001 thru 401B0053, 401B0054 and on), 402 (402-0001 thru 4-2B0035, 402B0036 and on), 411 (all serials), 414 (414-0001 thru 414-0098, 414-0099 and on), 421 (421-0001 thru 421A0158, 421B0001 and on).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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