AD 2020-02-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Inc | Airworthiness Directives; Bell Helicopter Textron Inc. Helicopters |
| aircraft | Bell | Helicopter Textron Inc | Airworthiness Directives; Bell Helicopter Textron Inc. Helicopters |
Unsafe Condition
Numerous failures of inverters due to an external connector that caused a short circuit inside inverter P/N 412-375-079-101 and components chafing because of variations in the assembly process and packaging tolerances for inverter P/N 412-375-079-103.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the affected inverter with a new inverter, P/N 412-375-079-105, or a retrofit kit to correct the unsafe condition.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service (TIS)
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Affected Aircraft
Bell Model 412 and 412EP helicopters with static inverters P/N 412-375-079-101 or 412-375-079-103 with serial numbers 29145 or higher installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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