NTSB Safety Recommendations A-08-53 through -55

[NTSB Press Releases <NTSBPressReleases@xxxxxxxx>]

Title: NTSB Safety Recommendations A-08-53 through -55

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                   NTSB SAFETY RECOMMENDATION
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National Transportation Safety Board
Washington, DC 20594

July 23, 2008

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Safety Recommendations A-08-53 through -55

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The National Transportation Safety Board recommends that the Federal Aviation
Administration:

Require all operators of Airbus A320 family aircraft to modify these aircraft in
accordance with Airbus Service Bulletin A320-24-1120 to provide the automatic
reconfiguration of the AC essential bus power supply in the event that the AC 1
electrical bus fails. (A-08-53)

Require Airbus to develop a modification for in-service A320 family aircraft such
that, in the event of an AC 1 electrical bus failure, the standby attitude indicator is
powered by an additional power source that will last for a minimum of 30 minutes,
and require operators to incorporate this modification as soon as possible after it
is available. (A-08-54)

Require all operators of A320 family aircraft to develop new procedures, if
necessary, and to provide flight crews with guidance and simulator training
regarding the symptoms and resolution procedures for the loss of flight displays
and systems in conjunction with an AC 1 electrical bus failure. (A-08-55)

The Safety Board also issued safety recommendations to the European Aviation Safety Agency.

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http://www.ntsb.gov/recs/letters/2008/A08_53_55.pdf

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The complete recommendation letter is available on the Web
at the URL indicated above.

The letter is in the Portable Document Format (PDF) and can
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An archive of recommendation letters is available at
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Electronic versions of letters may or may not include enclosures; however, related
publications, accident
briefs, and aviation accident synopses may be found
on the NTSB website.

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