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Ansett New Zealand Flight 703
Ansett New Zealand Flight 703 was an Ansett New Zealand scheduled passenger transport flight from Auckland Airport to Palmerston North. On 9 June 1995, the de Havilland Canada Dash 8 aircraft flying this route crashed into hilly terrain in the Tararua Ranges, 16 km east of Palmerston North airport, during an instrument approach in bad weather. The aircraft was carrying 18 passengers and three crew members. All passengers were New Zealand citizens except for one United States citizen. The flight attendant and three passengers died as a result of the crash.
==Incident==
During the approach to a right turn which would place the aircraft on final approach to runway 25, the right landing gear failed to fully extend so the co-pilot began to manually extend it using a hydraulic pump. The aircraft's power settings had already been reduced to ''Flight Idle'' which was normal, but the aircraft was inadvertently allowed to descend too low toward the undulating terrain leading into Palmerston North. The initial impact with terrain occurred at above sea level; an aircraft on profile should have been above sea level.〔(【引用サイトリンク】 title=Occurrence Report Details – Investigation 95-011 )〕
Although Flight 703's Ground Proximity Warning System (GPWS) sounded an alarm four seconds before the aircraft hit the ground, the crew was unable to avoid the accident. According to the Transport Accident Investigation Commission (TAIC) report an audio alarm telling the crew to climb the aircraft should have sounded 17 seconds before impact, but the GPWS malfunctioned, for reasons which have never been determined. There was an investigation by the New Zealand Police in 2001 into whether or not a mobile phone call from the aircraft may have interfered with the system. The official crash report〔 does mention the following on page 69:
"The aircraft manufacturer's avionics representative advised that there was no likelihood that the operation of a computer, other electronic device or a cell phone would have affected the aircraft's flight instruments."
The captain's defence was that 4.5 seconds before impact the radar altimeter display flipped 1000 feet in altitude as he watched.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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