in the transport role. RMAF gained an air defence capability when the Australian Government donated 10 ex-Royal Australian Air Force (RAAF) CAC Sabre fighters. These were based at the Butterworth Air Base. After the withdrawal of British military forces from Malaysia and Singapore at the end of 1971, a Five Power Defence Arrangements (FPDA) agreement between Malaysia, Singapore, New Zealand, Australia, and the United Kingdom was concluded to ensure defence against external aggression. The RAAF maintained two Mirage IIIO squadrons at RAF/RAAF Station Butterworth, Butterworth Air Base as part of its commitment to the FPDA. These squadrons were withdrawn in 1986, although occasional deployments of RAAF aircraft continue. Modernisation With the withdrawal of British military forces, RMAF underwent gradual modernisation from the 1970s to the 1990s. The Sabre were replaced by 16 Northrop F-5E Tiger-IIs. A reconnaissance capability was acquired with the purchase of two RF-5E Tigereye aircraft. RMAF also purchased 88 ex-US Navy Douglas A-4C Skyhawks, of which 40 of the airframes were converted/refurbished by Grumman Aircraft Engineering at Bethpage into the A-4PTM ('Peculiar To Malaysia'), configuration (similar to A-4M standard). RMAF has traditionally looked to the West for its purchases, primarily to the United States. However, limitations imposed by the US on "new technology" to the region, such as the AIM-120 AMRAAM fire-and-forget air-to-air missile, has made RMAF consider purchases from Russia and other non-traditional sources. The 1990s saw the arrival of first the BAE Hawk Mk108/208 which replaced the T/A-4PTMs, followed by the MiG-29N/NUB in 1995 in the air superiority role and delivery of the F/A-18D Hornet in 1997 to provide an all weather interdiction capability. In 2003 a contract was signed for 18 Su-30MKMs for delivery in 2007 to fulfill a requirement for an initial order of multi-role combat aircraft (MRCA). A requirement for a further 18 MRCAs remains unfulfilled. RMAF is also looking for an AWACS aircraft, although no firm orders have been placed. On 8 December 2005, four Airbus Military A400M aircraft were ordered to enhance the airlift capability. By March 2017 all Malaysian A400Ms were delivered to the customer. In late 2006, the Government signed a contract to purchase eight Aermacchi MB-339CMs to add to the eight MB-339AMs already in service. In March 2007, then-Deputy Prime Minister and Defence Minister Najib Razak notified the public that the MiG-29 would continue in service until 2010. Later that year, Najib announced the Sikorsky S-61A4 Nuri