AD 98-13-40
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA330F | Airworthiness Directives; Eurocopter France Model SA 330F, G, and J Helicopters |
| aircraft | Airbus Helicopters | SA330G | Airworthiness Directives; Eurocopter France Model SA 330F, G, and J Helicopters |
| aircraft | Airbus Helicopters | SA330J | Airworthiness Directives; Eurocopter France Model SA 330F, G, and J Helicopters |
Unsafe Condition
Loss of the common ground of the two transformer-rectifiers could result in a complete electrical failure (essential and secondary), loss of electrically-powered instrumentation, and subsequent loss of control of the helicopter.
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Required Actions
Verify the torque on the nut (part number 22541N080) securing the common ground of the transformer-rectifiers within 10 hours time-in-service. Install Eurocopter France Modification No. 0725580 or 0725681 within 500 hours time-in-service.
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Compliance Time
Within 10 hours time-in-service (TIS) and within 500 hours TIS
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Affected Aircraft
Eurocopter France Model SA 330F, G, and J helicopters, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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