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Independent Air Flight 1851
On 8 February 1989, Independent Air Flight 1851, a Boeing 707 on an American charter flight from Bergamo, Italy to Punta Cana, Dominican Republic, struck Pico Alto while on approach to Santa Maria Airport in the Azores for a scheduled stopover. The aircraft was destroyed, with the loss of all 144 on board, resulting in the deadliest plane crash in Portugal's history.
== Accident ==
During final approach to Santa Maria Airport, the air traffic controller instructed the crew to descend to for an ILS approach to runway 19. During that transmission, a trainee controller had also transmitted an incorrect QNH (barometric altimeter) setting that was 9 hPa too high. The approach instructions were not fully heard since the pilot had re-keyed his microphone to acknowledge the new QNH, and likely did not hear the second repeat of the 3,000 ft safe altitude, declaring: "We’re re-cleared to 2,000 feet..." (610 m). Although the first officer questioned the barometric altitude, the captain agreed that the first officer had heard the read-back correctly.
After having been cleared to the ILS approach, the crew failed to accomplish the approach briefing, missing an opportunity to notice the 3,000 ft minimum safe altitude and the presence of Pico Alto.
Leveling off at , the airliner experienced heavy turbulence near Santo Espírito and subsequently impacted the ridge of Pico Alto in a level attitude at an altitude of . There was no evidence of any in-flight emergency and the altimeter was found correctly set to 1027 mb.
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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