AD 2024-17-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Inc | Airworthiness Directives; Bell Textron Inc. Helicopters |
| aircraft | Bell | Textron Inc | Airworthiness Directives; Bell Textron Inc. Helicopters |
Unsafe Condition
Failure of the tail boom attachment structure, including fatigue cracking of tail boom attachment fittings, cap angles, longerons, and bolts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspecting the tail boom assembly hardware, replacing tail boom attachment hardware, greasing the bolt shanks, and inspecting torque. For Model 210 helicopters, removing the upper LH steel alloy barrel nut, retainer, and bolt from service and replacing them with a new nickel alloy barrel nut, new retainer, new bolt, an airworthy countersunk washer, and airworthy plain washers. For all applicable helicopters, visually inspecting the upper RH bolt and its associated hardware, and depending on the inspection results, removing the upper RH bolt and barrel nut from service. Additionally, visually inspecting the two lower bolts and the associated barrel nuts, and depending on the inspection results, removing any affected barrel nut and its associated bolt from service and removing any affected bolt from service. After the initial inspections have been completed, applying a coating of grease to each bolt shank only, installing the applicable hardware, and torquing each bolt. Thereafter, inspecting the torque applied on each bolt to determine if the torque has stabilized, and depending on the results, replacing and inspecting certain tail boom attachment point hardware and repeating the torque inspections or applying torque stripes. Lastly, prohibiting installing certain part-numbered steel alloy nuts on Model 204B helicopters and certain part-numbered steel alloy barrel nuts on Model 205A, 205A-1, 205B, and 210 helicopters.
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Compliance Time
Before further flight
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Affected Aircraft
Bell Textron Inc. Model 204B, 205A, 205A-1, 205B, and 210 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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