 Features engine nacelle fuel tanks, heavy duty landing gear and increased maximum take-off weight of 7,484 kg (16,500 lb).Typical mission profile involves a 100 n mile (185 km; 115 mile) flight to on-station; low-altitude surveillance sortie for 7 hours 20 minutes; and return to base with 45 minutes' fuel reserve.By early 2010, Hawker Beechcraft was offering structured programme of upgrades for King Air 350ERISR.