Not good in an ETOPS/EROPS TWIN
Airworthiness Directives; Airbus Model A330-201, -202, -203, -223, and -243 Airplanes, and Model A330-300 Series Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT).
ACTION: Final rule.
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SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
An A330 experienced an uncommanded engine 1 in flight spool down, which occurred while applying fuel gravity feed procedure, in response to low pressure indications from all fuel boost pumps, in both left and right wings.
The investigations revealed that the wing tank pressure switches P/N (part number) HTE69000-1 had frozen due to water accumulated in their external part, causing spurious low pressure indications.
As per procedure, the main pumps are then switched off, increasing the level of unavailable fuel. This, in combination with very low fuel quantities or another independent trapped fuel failure scenarios, can lead to fuel starvation on the affected engine(s). * * *
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We are issuing this AD to require actions to correct the unsafe condition on these products.
DATES: This AD becomes effective December 3, 2010.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of December 3, 2010.