AD 68-26-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269A | Airworthiness Directives; Hughes Models 269A, 269A-1, 269A-2, and 269B Helicopter |
| aircraft | Schweizer Aircraft Corporation | 269A-1 | Airworthiness Directives; Hughes Models 269A, 269A-1, 269A-2, and 269B Helicopter |
| aircraft | Schweizer Aircraft Corporation | 269B | Airworthiness Directives; Hughes Models 269A, 269A-1, 269A-2, and 269B Helicopter |
Unsafe Condition
Failures of the lower coupling drive shaft (Hughes P/N 269A5504-3) or lower coupling drive shaft assembly (Hughes P/N 80-269A5504-5 or 269A5504-5) due to cracks.
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Required Actions
Inspect the entire shaft per Hughes Service Information Notice No. N-55.1 or equivalent. Retire and replace shaft if cracks are found; identify the shaft if no cracks are found. Ensure inspection or identification is accomplished before installing replacement shafts.
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Compliance Time
within 25 hours of helicopter operation after the effective date of this airworthiness directive
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Affected Aircraft
Schweizer Aircraft Corporation Models 269A (Serial Nos. 0011 through 0893 except TH-55A), 269A-1 (Serial Nos. 0001 through 0041), 269A-2 (Serial Nos. 0001 and 0002), 269B (Series Nos. 0001 through 0359) with specified lower coupling drive shaft parts installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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