AD 84-09-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-2 Mk.I | Airworthiness Directives; DeHavilland Model DHC-2 MK. I, MK. II Beaver and MK. III Turbo Beaver Series Airplanes |
| aircraft | Viking Air Limited | DHC-2 Mk.II | Airworthiness Directives; DeHavilland Model DHC-2 MK. I, MK. II Beaver and MK. III Turbo Beaver Series Airplanes |
| aircraft | Viking Air Limited | DHC-2 Mk.III | Airworthiness Directives; DeHavilland Model DHC-2 MK. I, MK. II Beaver and MK. III Turbo Beaver Series Airplanes |
Unsafe Condition
Failure of the horizontal torque tube at the base of the control column which may cause loss of airplane control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 50 hours time-in-service after the effective date, inspect the control column lower sub-assembly (P/N C2CF843A or C2CF1977AND) for cracks in accordance with Service Bulletin No. 2/28, Rev B. Repeat inspections at intervals not exceeding 200 hours time-in-service. Repair or replace the assembly based on crack length per the Service Bulletin and report findings to the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours time-in-service after the effective date of this AD, unless accomplished within the last 150 hours time-in-service, and subsequently at intervals not to exceed 200 hours time-in-service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
DeHavilland Model DHC-2 MK. I (L-20A, YL-20, U-6 and U-6A), MK. II Beaver, and MK. III Turbo Beaver series airplanes certificated in any category.
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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