AD Amdt-39-11002
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer | Various | Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters |
Unsafe Condition
Cracking in the main rotor drive shaft due to loss of clamping torque on the hub and shaft assembly, caused by the use of grease between the hub and shaft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the main rotor drive shaft and inspect it for cracks. Replace the shaft with an airworthy one if cracks are found. Periodically verify the torque of the main rotor hub bolts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Schweizer Aircraft Corporation Model 269D helicopters with a large diameter hub.
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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