AD Amdt-39-9387
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer | Various | Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters |
Unsafe Condition
Structural failure of the main rotor (M/R) drive shaft, separation of the M/R from the helicopter, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct one-time radiographic inspection or other non-destructive inspection of certain main rotor drive shafts for cracks, distortion, corrosion, or other surface damage. Expand inspections to additional models and exclude certain drive shafts from specific inspections based on the AD's revised applicability.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A helicopters with certain main rotor drive shafts installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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