【视频】跟进：NTSB称佛州空难Learjet坠地前已开始解体，最后时刻时间线公布

美国国家运输安全委员会（NTSB）11月2日在佛罗里达州棕榈滩县 West Palm Beach 举行佛州 Learjet 60 空难首场媒体简报。委员会委员 Tom Chapman 表示，调查人员已有证据显示，这架飞机在撞地前就已开始解体，但哪些部件脱落、为何脱落目前仍不清楚。这架飞机11月1日坠毁于棕榈滩县 Greenacres 附近的居民区，机上2名机组人员与7名乘客共9人全部遇难。

Chapman 在简报中公布了航班最后阶段的时间线：飞机于美东时间11月1日上午10:37自 Austin 起飞，目的地为巴哈马 North Eleuthera；12:47，机组向空管报告遇到轻度明冰、自述尚可控制，同时报告中度湍流、机外温度为摄氏零下47度、飞机高度上下波动约700英尺；机组随后报告正飞入降水区，申请爬升至37,000英尺并获批准；不久之后、约12:48，机组报告飞机正在下降并发出 Mayday 求救，随后报告飞机处于超速状态、在快速下降中报出高度；约12:50，飞机坠毁于 Greenacres 附近 Military Trail 路旁。

首席调查员 Tim Monville 表示，残骸散布在约半英里长、0.4英里宽的区域内，落在球场与居民住宅等多处，飞机的部分部件可能落在距撞击点较远的地方；NTSB 呼吁发现残骸的民众不要触碰或移动、立即联系当局。飞机在路面留下的撞击坑部分积水，从坑中回收主体残骸将是一大挑战。Chapman 还表示，飞机记录显示该机曾装有驾驶舱语音记录器，但调查人员尚不确定记录器在事发时是否仍在机上。

Monville 表示，事发时段的天气是调查的重点之一，调查人员需要查清机组与空中交通管制各方在何时分别掌握了哪些天气信息。Chapman 表示，委员会在现场调查阶段不会认定事故的可能原因，也不会作推测；坠机原因目前仍未确定。

简报同时更新了地面伤情：Monville 表示，一名驾车离开坠机现场附近区域的男子腿部受伤，调查人员定于周一与其面谈；地面无人死亡。此前周日的通报称暂无地面人员伤亡报告。棕榈滩县法医办公室11月2日表示，机上9人的身份尚未确认，身份确认工作由地方当局负责。副驾驶的家属已向多家媒体确认，副驾驶为20岁的 Nathalia Gadelha Filgueiras，来自 Boca Raton 一带；其母亲表示，她17岁考取飞行执照、累计飞行逾1,300小时。机长与7名乘客的姓名尚未公布。

调查人员将在未来数日继续记录现场残骸，随后将残骸转移至安全设施作进一步检查，并调取飞机的维修记录、机组培训与经历记录及完整的空管通话录音。事件仍在发展中。

关联：跟进：最后通话称「我们没时间了」，佛州Learjet空难现场附近一所高中周一停课

关联：佛罗里达州一架Learjet 60坠入居民区 机上9人全部遇难

（来源：美国国家运输安全委员会）

[Video] Follow-Up: NTSB Says Florida Learjet Began Breaking Up Before Impact as Final-Minutes Timeline Is Released

The U.S. National Transportation Safety Board (NTSB) held its first media briefing on the Florida Learjet 60 crash on November 2 in West Palm Beach, Palm Beach County, Florida. Board Member Tom Chapman said investigators have evidence that the aircraft began breaking up before it hit the ground, though which parts came off and why is not yet clear. The jet crashed on November 1 near a residential area in Greenacres, Palm Beach County; all nine people on board, two crew members and seven passengers, were killed.

Chapman laid out the timeline of the flight's final phase at the briefing: the plane left Austin at 10:37 a.m. ET on November 1 bound for North Eleuthera in the Bahamas; at 12:47 p.m., the crew told controllers they were picking up light, clear ice that was manageable, and reported moderate turbulence, an outside temperature of minus 47 degrees Celsius, and altitude deviations of about 700 feet; the crew then reported flying into precipitation and asked to climb to 37,000 feet, which controllers approved; shortly after, at about 12:48 p.m., the crew reported they were descending and made a Mayday call, then reported an overspeed condition and called out their altitude as the jet fell rapidly; at about 12:50 p.m., the plane crashed beside Military Trail near Greenacres.

Investigator-in-charge Tim Monville said debris was scattered across an area about half a mile by four-tenths of a mile, landing on ball fields and at people's homes, and that parts of the aircraft may be found some distance from the impact site; the NTSB asked anyone who finds debris not to touch or move it and to contact authorities. The crater the plane left in the roadway is partially filled with water, and recovering the main wreckage from it will be a major challenge. Chapman also said the aircraft's records show it had a cockpit voice recorder at some point, but investigators do not yet know whether one was still on board.

Monville said the weather at the time is a major focus of the investigation, and that investigators need to establish who knew what, and when, about the weather among the crew and air traffic control. Chapman said the board will not determine a probable cause while on scene and will not speculate; the cause of the crash has not been determined.

The briefing also updated the ground toll: Monville said a man driving away from the area next to the crash site suffered a leg injury, and investigators planned to interview him on Monday; no one on the ground was killed. Officials had said on Sunday that there were no immediate reports of ground injuries. The Palm Beach County Medical Examiner's Office said on November 2 that the nine people on board had not yet been identified, and that identification is up to local authorities. The co-pilot's family has confirmed to multiple news outlets that she was Nathalia Gadelha Filgueiras, 20, of the Boca Raton area; her mother said she earned her pilot's license at 17 and had logged more than 1,300 flight hours. The names of the captain and the seven passengers have not been released.

Investigators will spend the coming days documenting the wreckage, then move it to a secure facility for closer examination, and will review the aircraft's maintenance records, both pilots' training and experience, and the full air traffic control recordings. The investigation is ongoing.

Related: Follow-Up: Final Calls Included 'We're Out of Time'; High School Near Florida Learjet Crash Site to Close Monday

Related: Florida Learjet 60 Crashes Into Residential Area, All Nine Aboard Killed

(Source: U.S. National Transportation Safety Board)

来源：美国国家运输安全委员会

发布：GSM·美国（发布链接）

图片来源：一架Learjet 60公务机（资料图，非涉事飞机）。Raimond Spekking摄，CC BY-SA 4.0，经Wikimedia Commons。 / A Learjet 60 business jet (file photo, not the accident aircraft). Photo by Raimond Spekking, CC BY-SA 4.0, via Wikimedia Commons.

GSM Global · 本篇英文版 English edition of this story

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