displays and two multifunction displays, to present all key flight data. The navigation system includes VHF omnidirectional range (VOR), distance measuring equipment (DME), automatic direction finder (ADF), radar altimeter, Global Positioning System (GPS), air data computer, and a flight management system. A three-axis autopilot can be optionally incorporated, as can a weather radar and high frequency (HF) radio. While designed for two-pilot operation, the Dornier 228 can be flown by only one crewmember. Additional changes include the Garrett TPE331-10 engines, which have been optimized to work with the redesigned five-bladed fibre-composite propellers now used by the type, which are more efficient, quick to start, and produces substantially less vibration and noise than the original metal four-bladed predecessor. Through its engines, the Dornier 228 NG has the longest time between overhaul (TBO) of any 19-seat aircraft, reportedly up to 7,000 hours. An engine-indicating and crew-alerting system (EICAS) is also present for safety purposes; additional optional safety equipment akin to much larger passenger aircraft, including airborne collision avoidance system (ACAS) and terrain awareness and warning system (TAWS), can be incorporated as well. At in clean config, the 228NG burns of fuel per hour at a cruise. Operators In July 2018, 57 aircraft were in airline service. Other operators include police, law enforcement, paramilitary operators and military operators. By July 2018, the fleet accumulated over four million flight hours. Accidents and incidents The Dornier 228 has been involved in 54 aviation accidents and incidents including 41 hull losses. Those resulted in 205 fatalities Specifications (Dornier 228NG) See also References External links 1980s German airliners Dornier 228 STOL aircraft High-wing aircraft Twin-turboprop tractor aircraft Aircraft first flown in 1981