AD Amdt-39-17481
Unsafe Condition
In-flight double generator failure, which could result in reduced control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Apply 3M 5300 or 3M 4200 sealant between the bus bar assemblies and the backplate assembly. Initial application for certain serial numbers must be completed within 5,000 flight hours after September 27, 2010, or within 100 flight hours from the effective date of this AD, whichever is later. Repetitive applications are required every 10,000 flight hours. An optional terminating action is available: replace the bus bar assembly with a slip ring de-icer harness.
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Compliance Time
Within 5,000 flight hours after September 27, 2010, or within 100 flight hours from the effective date of this AD, whichever occurs later, for initial application. Repetitive applications are due every 10,000 flight hours.
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Affected Aircraft
Dowty Propellers R408/6-123-F/17 model propellers.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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