AD 53-21-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-2 Mk.I | Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft |
| aircraft | Viking Air Limited | DHC-2 Mk.II | Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft |
| aircraft | Viking Air Limited | DHC-2 Mk.III | Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft |
Unsafe Condition
Installation of extra washers, packing, or bushings in the wing rear spar attachment bolt fitting, which could interfere with the intended clearance designed to accommodate drag loads.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all Beaver aircraft to ensure no washers, bushings, or spacers are installed in the rear spar wing bolt fitting. Remove any such items found. Ensure proper assembly by attaching the front spar first and not packing gaps with washers or spacers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
As soon as possible but not later than December 1, 1953.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Viking Air Limited DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III aircraft.
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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