AD 93-11-06
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
Structural failure of the wing inboard leading edge and support structure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the wing inboard leading edge and support structure per Modification No. 7/1632 and de Havilland Service Bulletin 7-57-14 dated June 25, 1982. Alternative methods of compliance may be approved by the Manager, New York Aircraft Certification Office.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 6 months after the effective date of this AD
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Affected Aircraft
De Havilland Model DHC-7 series airplanes; serial numbers 3 through 37, inclusive; 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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