In the past decade Bulgaria has been trying actively to restructure its army as a whole and a lot of attention has been placed on keeping the aging Russian aircraft operational. Currently the attack and defence branches of the Bulgarian air force are mainly MiG-29s and Su-25s. About 15 MiG-29 fighters have been modernised in order to meet NATO standards. The first aircraft arrived on 29 November 2007 and final delivery was due in 03/09. In 2006 the Bulgarian government signed a contract with Alenia Aeronautica for the delivery of five C-27J Spartan transport aircraft in order to replace the Soviet made An-24 and An-26, although the contract was later changed to only three aircraft. Modern EU-made transport helicopters were purchased in 2005 and a total of 12 Eurocopter Cougar have been delivered (eight transport and four CSAR).Three Eurocopter AS565 Panther for the Bulgarian Navy in 2016.