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NTSB issues recommendations to European Aviation Safety Agency.
July 30, 2008 -
According to NTSB, European Aviation Safety Agency should require all operators of Airbus A320 family aircraft to modify aircraft in accordance with Airbus Service Bulletin A320-24-1120 to provide automatic reconfiguration of AC essential bus power supply in event that AC 1 electrical bus fails. Standby attitude indicator should be powered by additional power source that will last for minimum of 30 minutes in event of AC 1 electrical bus failure.
The National Transportation Safety Board recommends that the European Aviation Safety Agency:
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-08-56)
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-08-57)
Require all operators of A320 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-08-58)
The Safety Board also issued safety recommendations to the Federal Aviation Administration.
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 be read using the Acrobat Reader 5.0 or later from Adobe (http://www.adobe.com/prodindex/acrobat/readstep.html). An archive of recommendation letters is available at http://www.ntsb.gov/recs/letters/letters.htm. 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. Company Information: Name: National Transportation Safety Board Address: 490 L'Enfant Plaza, SW City: Washington State: DC ZIP: 20594 Country: USA Phone: 202-314-6000 http://www.ntsb.gov
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