AD 2015-17-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters |
| aircraft | Bell | 206L-4 | Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters |
Unsafe Condition
Failure of a driveshaft due to cracking of the flex frame on the forward end of the driveshaft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 50 hours TIS, determine if driveshaft P/N 206-340-300-105 has been installed on a Bell Model 407 helicopter. If so, inspect for cracks, loose bolts/nuts, or red powder residue within 25 hours TIS and replace if found. Replace all driveshafts before accumulating 1,250 hours TIS. Do not install driveshaft P/N 206-340-300-105 on any helicopter if it has been installed on a Bell Model 407 helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 hours TIS for initial determination, within 25 hours TIS for inspection if applicable, and before accumulating 1,250 hours TIS for replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 206L-4, 407, 427, and 429 helicopters with engine-to-transmission driveshaft assembly, part number 206-340-300-105, 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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