AD 94-09-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
Unsafe Condition
Corrosion and fatigue cracking in adapter plates and seal retaining angles on the fuselage side access panel could degrade structural capabilities.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect clearance between adapter plates and seal retaining angles per service bulletins; modify or repair based on scoring depth (≤0.050 inch requires specific modifications, ≥0.050 inch requires approved repair methods).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 12 months after the effective date of this AD, or prior to further flight if scoring exceeds limits.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
De Havilland Model DHC-7 series airplanes with serial numbers 1 through 99 inclusive.
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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