European aerospace giant Airbus is believed to be in the running to buy Air New Zealand's Safe Air engineering subsidiary.
Blenheim-based Safe Air does upgrade and maintenance work for the Royal New Zealand Air Force as well as for other military and commercial aircraft operators around the world.
The engineering base has long been deemed non-core to Air New Zealand's business and the company has been looking for a buyer for several years.
Safe Air has carried out more than 90 per cent of the RNZAF's heavy maintenance since 1998.