F-111 A08-135 was handed back to 82 Wing, RAAF in Hangar 278, where Deeper Maintenance work began on the first F-111 35 years ago.
"Today is a day all of us will remember...it is a day that marks the beginning of the end of an era - the F-111 era," John Duddy, Vice President and Managing Director, Boeing Defence Australia, said.
"We take pause to honour and recognise every RAAF serviceperson and Boeing employee who has contributed toward maintaining this platform."
Air Commodore Roy McPhail, Director General of Aerospace Combat Systems, and Group Captain Peter Lloyd, Officer Commanding - 82 Wing, took delivery of the final F-111 in front of Boeing and RAAF personnel.
"The maintenance systems introduced with the F-111 aircraft have been a mainstay of defence and industry's high-tech support capabilities for well over 35 years," Air Commodore McPhail said.
"Today's completion of the F-111 Deeper Maintenance program will ensure the F-111 fleet remains fully capable until the replacement F/A-18F Super Hornets come on line."
The Deeper Maintenance program began in 1974 with the RAAF, and transitioned to Boeing in 2001, for a total of 500,000-plus work hours.
Boeing, which recently received an Engineering Excellence Award from the Queensland Division of Engineers Australia for its F-111 support, is contracted to perform light maintenance activities until the fleet's withdrawal from service at the end of 2010.
The company says it is "working hard" to retain as many F-111 Boeing employees as possible through the workforce planning process, and says employees who cannot be retrained or reassigned to other positions, such as Super Hornet sustainment or Wedgetail support, will receive redundancy.