AD 84-05-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 214B | BELL HELICOPTER TEXTRON INCORPORATED Models 214B, 214B-1, and 214ST helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214B-1 | BELL HELICOPTER TEXTRON INCORPORATED Models 214B, 214B-1, and 214ST helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214ST | BELL HELICOPTER TEXTRON INCORPORATED Models 214B, 214B-1, and 214ST helicopters |
Unsafe Condition
Cracks in collective sleeves P/N 214-010-411-(all dash numbers) with serial number prefix A-19 could result in loss of collective control.
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Required Actions
Magnetic particle inspect collective sleeves per Bell Service Bulletin 214ST-84-17 or 214B-84-26, remove and replace cracked parts, and comply with specified inspection schedules based on time-in-service.
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Compliance Time
Perform inspection before further flight (for 0-500 hours time-in-service), prior to next 100 hours time-in-service (500-1000 hours), or not later than next 2500 hour overhaul period (1000+ hours).
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Affected Aircraft
Bell Helicopter Textron, Inc. Models 214B, 214B-1, 214ST helicopters with collective sleeves P/N 214-010-411-(all dash numbers) having serial number prefix A-19.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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