AD 2021-18-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
| aircraft | Bell | Textron Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
Unsafe Condition
three reports of unexpected forces or uncommanded inputs to the directional (yaw) control system
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
revising the existing Rotorcraft Flight Manual for your helicopter by adding procedures in Section 2, Normal Procedures, under 2-4. INTERIOR AND PRESTART CHECK, 2-5. ENGINE START, and 2-8. TAKEOFF; Section 3, Emergency and Malfunction Procedures, under 3-9. AUTOMATIC FLIGHT CONTROL SYSTEM; and Section 4, Performance, under 4-2. POWER ASSURANCE CHECK
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Textron Canada Limited Model 429 helicopters, certificated in any category, serial numbers 57001 and subsequent
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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