AD 2018-21-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking | Air Limited | Airworthiness Directives; Viking Air Limited Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Viking Air Limited Airplanes |
Unsafe Condition
Pitting corrosion on the shank of the wing strut attach bolts, which could cause a surface condition that may have a detrimental effect on fatigue and corrosion resistance, leading to bolt failure and consequent failure of the wing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the wing strut shank bolts for pitting corrosion and replace any affected bolts with new ones, as specified in the service information.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Viking Air Limited Model DHC-3 airplanes, with wing strut attach bolts part numbers C3W114-3, C3W129-3, and C3W128-3.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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