AD 75-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269A | Airworthiness Directives; Hughes 269 series helicopters |
| aircraft | Schweizer Aircraft Corporation | 269A-1 | Airworthiness Directives; Hughes 269 series helicopters |
| aircraft | Schweizer Aircraft Corporation | 269B | Airworthiness Directives; Hughes 269 series helicopters |
| aircraft | Schweizer Aircraft Corporation | 269C | Airworthiness Directives; Hughes 269 series helicopters |
Unsafe Condition
The linear clutch actuators with retainer screws having a single band of vertical lines around the outside diameter of the raised head may fail, leading to clutch malfunction and potential loss of control.
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Required Actions
Remove the actuator and cover at the lug end of the linear clutch actuator. Visually inspect retainer screws for vertical line markings and replace any affected screws with specified part numbers (P60HS440-12C or S6370CESCS4-12) and torque to 5-7 inch-pounds. Stamp the actuator data plate with 'B' and reassemble per maintenance manual. Record modifications in aircraft maintenance records.
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Compliance Time
Prior to further flight
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Affected Aircraft
Schweizer Aircraft Corporation models 269A, 269A-1, 269B, 269C, and military model TH-55A equipped with linear clutch actuators P/N DL 1020M81C(12V), 269A4564, or DL 1020M82C(28V), including those with Hughes Service Information Notice No. N-126 accomplished.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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