AD 2024-16-19
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
Cracked tail boom attachment barrel nuts (barrel nuts) due to corrosion damage, high time in service, or hydrogen embrittlement, which can cause loss of torque on the associated bolt and subsequent bolt cracking.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace all steel alloy barrel nuts with nickel alloy barrel nuts. Replace or inspect other tail boom attachment point hardware. Repetitively inspect torque. Repetitively replace tail boom attachment bolts. Prohibit installing steel alloy barrel nuts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5,000 flight hours or 5 years, depending on the specific helicopter model and serial number.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Textron Inc. Model 212, 412, 412CF, and 412EP helicopters, with specific serial number ranges as detailed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.