United Airlines

June 2, 2008 U.S. Department of Transportation Docket Operations, M–30 West Building Ground Floor, Room W12–140 1200 New Jersey Avenue, SE Washington, DC 20590 Subject: Docket: FAA-2008–0558 Directorate Identifier: 2007–NM–365–AD A-320 / -319 - Loss of AC Bus 1, AC ESS Bus and DC ESS Bus MCAI Dear Sir / Madam - The subject NPRM advised of and requested comments on the subject proposed rule that will mandate embodiment of Airbus Service Bulletin A320-33-1057, dated May 11, 2007. We concur with the contents of the proposed rule and offer the following comments. We request that the current revision level of Service Bulletin A320-33-1057 (Revision 1, dated Jan 31, 2008) be referenced as the compliance action document. Sincerely, John Brewster John Brewster A319 / A320 Engineering Fleet Chief Narrowbody Aircraft Engineering United Airlines cc: Greg Borsari, United Airlines – INDEG Chris Parfitt, United Airlines – INDEG Sue Tietsort, United Airlines – INDEG Dennis Tangney, United Airlines – SFOEG