AD 2013-12-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada | Airworthiness Directives; Bell Helicopter Textron Canada Helicopters |
| aircraft | Bell | Helicopter Textron Canada | Airworthiness Directives; Bell Helicopter Textron Canada Helicopters |
Unsafe Condition
High-stress-concentration areas in the tailboom skin that are at risk of cracking. This condition could result in a crack in the tailboom assembly, failure of the tailboom, and subsequent loss of helicopter control.
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Required Actions
Inspect the tailboom assembly for a crack, loose rivet, or other damage at specified intervals. For helicopters with a tailboom assembly that has 8,600 or more hours time-in-service (TIS), visually check for a crack in the 'C' and 'D' areas depicted in Figures 1 and 2 before the first flight of each day.
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Compliance Time
Within the specified compliance time unless already accomplished.
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Affected Aircraft
Bell Helicopter Textron Canada Model 407 helicopters with tailboom assembly part number (P/N) 407-030-801-201, 407-030-801-203, or 407-030-801-205, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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