AD 2014-04-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters |
| aircraft | Bell | 407 | Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters |
Unsafe Condition
Cracks in the tailboom skins, particularly on the left side near the horizontal stabilizer attachment area, which could lead to tailboom separation 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
Inspect for cracks in the tailboom skins, particularly on the left side near the horizontal stabilizer attachment area. Replace the tailboom if a crack is found. Modify and re-identify certain tailbooms. Install an improved horizontal stabilizer assembly. Assign a 5,000-hour time-in-service (TIS) limit to the tailboom. Perform repetitive inspections at specified intervals.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 407 helicopters with certain serial numbers and part numbers, as specified in the AD, including tailbooms with part numbers 407-030-801-157, 407-530-014-101, -103, and original production tailboom assembly 407-030-801-107.
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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