AD 64-06-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269A | Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269A-1 | Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269B | Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters |
Unsafe Condition
Failure of the lower coupling drive shaft (Hughes P/N 269A5504) due to cracking at the radii of end splines, alinement collar, and boot mounting collar.
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Required Actions
Within 25 hours' time in service after the effective date, inspect the shaft via dye penetrant or magnetic particle inspection, focusing on specified areas. Replace any cracked shaft before further flight. Within 500 hours' time in service but before 1,500 total hours on the part, replace the shaft with P/N 269A5504-3.
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Compliance Time
Within the specified timeframes: 25 hours' time in service for initial inspection, 500 hours' time in service for replacement, not exceeding 1,500 total hours on the part.
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Affected Aircraft
Schweizer Aircraft Corporation Models 269A (Serial Numbers 0011-0314), 269A-1 (Serial Numbers 0001-0007), and 269B (Serial Numbers 0001-0079).
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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