AD 92-20-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; De Havilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; De Havilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; De Havilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; De Havilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; De Havilland Model DHC-7 Airplanes |
Unsafe Condition
Corrosion on main landing gear emergency down release cables could result in failure of the cables, preventing the landing gear from being lowered, leading to a gear-up landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 30 days after the effective date, perform a detailed inspection of the MLG emergency down release cables for corrosion per Alert Service Bulletin A7-32-94. If corrosion is found, replace both cable assemblies with stainless or carbon steel cables before further flight. Within 6 months or 12 months after installing carbon steel cables, install Post-Modification 7/2609 cables.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD, and within 6 months after the effective date or within 12 months after installing carbon steel cables
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
De Havilland Model DHC-7 airplanes with stainless steel cables Post-Modification Number 7/2609 not installed, 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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