AD 83-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes |
Unsafe Condition
Fracture of the control column lower weld assembly could cause loss of primary flight controls.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the control column lower weld assembly (P/N C3CF 39-15 or C3CF 39-13) within 25 hours time-in-service after the effective date, and every 100 hours thereafter. Replace or repair assemblies with cracks as specified in Service Bulletin 3/39, using approved parts or methods. Discontinue inspections after installing P/N C3CF 39-21.
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Compliance Time
Within the next 25 hours time-in-service after the effective date of this AD, unless already accomplished within the last 75 hours, and at each 100 hours time-in-service thereafter
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Affected Aircraft
DeHavilland Model DHC-3 (U-1A) 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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