AD 2008-12-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking | Air Limited Models DHC-2 Mk | Airworthiness Directives; Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-3 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-3 Airplanes |
Unsafe Condition
A complete loss of both ignition systems occurred due to the lock wire hole in the ignition connector plug on the firewall breaking out, allowing the plug to vibrate loose. This resulted in both magneto systems grounding out through a spring-loaded safety pin incorporated into the Cannon plug.
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Required Actions
Inspect the ignition connector plugs for the presence of the spring-loaded safety pin. Replace the existing connectors with a new design that incorporates a 'straight through' type connector to ensure magneto circuit integrity if the connection opens.
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Compliance Time
Before further flight
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Affected Aircraft
Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-3 airplanes with piston engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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