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On 27 January 2001, an Antonov An-70 prototype crashed close to Omsk Tsentralny Airport, Russia during testing of the aircraft. All 33 passengers and crew on board the aircraft survived. The accident involved the sole surviving An-70 prototype, as the first prototype had been destroyed in a mid-air collision six years previously. This placed the future of the An-70 project in doubt; however, the aircraft was later repaired and returned to flight. ==Accident== The aircraft arrived at Omsk at 0:30 and was refueled with 38 tons of jet fuel.〔http://www.aer.ita.br/~bmattos/mundo/country/russia/an-70.html〕 5 hours after landing the four engine propfan lifted off the runway on its way to Yakutsk for cold weather testing. Within seconds of becoming airborne one of the Progress D-27 engines with Contra-rotating propellers reached an over-speed condition and automatically shut down. The forward propeller stopped rotating but due to the nature of the failure the aft proppeller kept turning, producing negative thrust. At this point the flight crew increased power to the remaining three engines but a problem with the RPM sensors on one of them led to automatic engine shut-off. Thus, the An-70 ended up flying at low speed with only two properly functioning engines, with the third engine generating over 11,000 pounds of negative thrust and disrupting airflow across the wing.〔 The crew successfully made a 180 degree turn to head back towards departure airport but crash landed hard in the snow and ice within several hundred yards of the runway. Of the 33 people aboard (11 crew and 22 specialists from Antonov), 4 were injured, 1 seriously.〔http://www.cthomas.de/an_70_news.htm〕 The accident investigators found that the pilots acted with remarkable skill to turn the aircraft around and crash-land it on the field without lowering the landing gear. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2001 Omsk An-70 crash」の詳細全文を読む スポンサード リンク
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