 However, due to the crash of Hercules C4 "ZH873" in August 2017, one Hercules C5 will be retained to keep the fleet at 14 aircraft.The Airbus Atlas C1 (A400M) replaced the RAF's fleet of Hercules C1/C3 (C-130K) transport aircraft which were withdrawn from service on 31 December 2012.The A400M is also expected to replace the C4/C5 variants.