AD 98-23-12
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
Fatigue cracking in certain significant structural areas could reduce the structural integrity of these airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate inspections and intervals from specified maintenance manuals into FAA-approved programs, inspect prior to thresholds, repair discrepancies using approved manuals or data, and report inspection results to de Havilland.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
Viking Air Limited Model DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103 airplanes, all serial numbers.
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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