AD 94-17-08
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
Corroded aluminum washers in the DC firewall terminal block assembly may loosen the electrical connections, interrupting DC electrical power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove aluminum or brass hardware in the firewall terminal block assembly and replace with steel hardware per Service Bulletin S.B. 7-24-69. Submit alternative methods of compliance through an FAA Principal Maintenance Inspector for approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days after the effective date of this AD (September 21, 1994).
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Affected Aircraft
De Havilland 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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