On November 9, 2005, at 0835 local Australia time, a Boeing 737-7Q8, registered in Australia to Virgin Blue Airlines Pty Ltd as VH-VBI (serial number 30644), experienced a rapid decompression at flight level 400. The aircraft was enroute from Sydney, New South Wales, Australia, to Melbourne, Victoria, Australia at the time of the decompression. The flightcrew donned oxygen masks and conducted a rapid descent to 10,000 feet. No Injuries occurred. The Australian Transport Safety Bureau is considering this a serious incident and will perform an investigation. The Boeing Company has been notified. Questions about this investigation should be directed to the ATSB at phone 61 2 6230 4408 or email www.atsb.gov.au.