AD 98-11-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 212 | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 212 Helicopters |
Unsafe Condition
Failure of the tail rotor yoke could lead to loss of the tail rotor and subsequent loss of control of the helicopter due to unforeseen static and dynamic loading of the tail rotor.
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Required Actions
Review historical records for excessive bending load incidents on the yoke. Replace the yoke assembly with an airworthy unit having zero hours TIS or passing x-ray diffraction inspection. Install airworthy trunnion assembly or flapping stop as applicable. Inspect trunnion or flapping stop at intervals not exceeding 25 hours TIS or after incidents causing excessive bending loads.
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Compliance Time
Before further flight if excessive bending load incidents exist; within 180 calendar days otherwise. Thereafter, inspections at intervals not exceeding 25 hours TIS or before further flight after incidents.
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 212 helicopters with tail rotor yoke assembly part numbers 212-010-704, 212-010-744, or 212-011-702 (all dash numbers).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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