AD Amdt-39-9408
Unsafe Condition
High voltage arcing in the cabin caused by improperly installed, damaged, or improperly configured lamp connectors and fluorescent lamps, leading to smoke, fire, electrical shock, and possible electromagnetic interference.
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Required Actions
Inspect and adjust or replace improperly installed, damaged, or improperly configured lamp connectors and fluorescent lamps. Optionally replace certain power units and power supplies with new technology parts as terminating action to repetitive inspections.
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Compliance Time
Before further flight
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Affected Aircraft
Aerospace Lighting Corporation (ALC) lamp connectors, fluorescent lamps, power units, and power supplies in cabin fluorescent lighting systems subject to the existing AD.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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