AD 2018-17-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | SAS | Airworthiness Directives; Airbus SAS Airplanes |
Unsafe Condition
The Constant Speed Motor/Generator (CSM/G), as installed on Airbus A330 aeroplanes, is qualified for an overload condition of 9.5 kVA for 30 minutes. This duration is sufficient to perform safe landing and go-around. However, electrical load analysis revealed that the hydraulic power might not be sufficient to supply the CSM/G during slat/flap extension, when only one engine is running. This condition, if not corrected, and in conjunction with the loss of main system, could lead to a scenario where the crew is not clearly warned that the electrical system has switched on the battery and thus has a limited duration to support a safe landing.
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Required Actions
Replace or modify the two flight warning computers (FWCs) in accordance with Airbus Service Bulletin A330-31-3232, Revision 01, dated February 14, 2017. Remove the applicable AFM Temporary Revision (TR) once the aeroplane is modified.
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Compliance Time
Before further flight
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Affected Aircraft
Airbus Model A330-200, A330-200 Freighter, and A330-300 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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