AD 93-21-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 214B | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. (BHTI) Model 214B and 214B-1 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214B-1 | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. (BHTI) Model 214B and 214B-1 Helicopters |
Unsafe Condition
Failure of the main rotor yoke assembly, leading to loss of the main rotor 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
Replace the main rotor yoke assembly based on time-in-service thresholds, install new airspeed versus altitude decals within 50 hours' time-in-service, and inspect the yoke for straightness within 50 hours' time-in-service and every 1,200 hours thereafter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron, Inc. Model 214B and 214B-1 helicopters, serial numbers 28001 through 28070, equipped with main rotor yoke assembly part number 214-010-105-001.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.