AD 93-15-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; De Havilland All Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; De Havilland All Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; De Havilland All Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; De Havilland All Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; De Havilland All Model DHC-7 Series Airplanes |
Unsafe Condition
Failure of the upper lockstrut sub-assembly, part numbers 15709-7 and 15709-9, could lead to partial collapse of the main landing gear.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a non-destructive testing inspection of upper lockstrut sub-assemblies within 250 landings after the effective date. If cracks are detected, replace the discrepant sub-assembly prior to further flight. Submit a report within 5 days of inspection completion to de Havilland, Inc.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 250 landings after the effective date of this AD
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Affected Aircraft
De Havilland All Model DHC-7 series 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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