Eurocopter AS350BB Écureul Powered by a derated Arriel 1D1 engine to improve the helicopter's life cycle, the HT.1 Squirrel is used by the UK MoD's Defence Helicopter Training School. Aérospatiale SA342M Gazelle French Army attack version fitted with the Astazou XIV engine. Armed with four Euromissile HOT missiles and a SFIM APX M397 stabilised sight. Eurocopter EC 135 T1 Powered by two 435 kW (583 shp) Turbomeca Arrius 2B1 engines, the German Army operates 14 EC135s as basic trainers at the School of Army Aviation in Bückeburg.