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cover of episode 369 Reagan Midair: CVR and FDR Data Revealed at NTSB Press Conference

369 Reagan Midair: CVR and FDR Data Revealed at NTSB Press Conference

2025/2/15
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J
Jennifer Homendy
P
Paul Wagner
S
Sean Payne
T
Tom Costello
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Jennifer Homendy: 作为NTSB主席,我在此次新闻发布会上公布了关于1月29日发生在里根国家机场附近的中空相撞事故的初步调查结果。我们的现场调查已经完成,并掌握了关键证据,现在将分享调查进展和后续步骤。本次事故涉及一架美国陆军黑鹰直升机和一架PSA航空的CRJ支线客机。初步调查显示,黑鹰直升机当时正在进行飞行员的检查飞行,包括年度检查和夜视镜检查。我们认为机组人员在飞行过程中可能佩戴了夜视镜。调查还发现,黑鹰直升机的高度表读数存在差异,这引起了我们对可能存在错误高度数据的关注。此外,空中交通管制(ATC)的通信中存在中断,导致黑鹰机组人员可能没有完全收到“从后面通过”的指令。我们将继续深入调查,包括进行能见度研究,评估夜视镜的影响,并分析空中交通管制通信和ADS-B传输问题。我们赞赏FAA立即采取行动限制直升机飞行,但目前尚未确定是否需要永久性更改。最终报告将包含更多调查结果。 Sean Payne: 作为NTSB车辆记录器部门的主管,我负责解释黑鹰飞行员在驾驶舱内读取高度时遇到的挑战。我们的实验室正在重建飞行记录器,并验证数据的准确性。我将解释几个关键的高度术语。无线电高度是通过直升机向地面发射信号来测量的,我们确认这个数据是有效的。然而,飞行员通常不依赖无线电高度进行导航。气压高度是飞行员常用的高度,但没有记录在飞行数据记录器(FDR)中。气压设置用于校准高度表,同样没有被记录。压力高度是一种工程高度,但我们发现这个数据是无效的。由于FDR没有GPS信息,我们无法使用GPS数据进行验证。我们正在努力确定坏数据是否影响了整个直升机系统。为了确定飞行员实际看到的高度,我们将与西科斯基、柯林斯航空和陆军合作,检查残骸,并评估高度表的功能。我们强调,调查的现场阶段已经完成,我们将一丝不苟地完成后续工作,最终报告将包含所有调查结果。

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The NTSB held a press conference to provide preliminary findings from the flight data recorder (FDR) and cockpit voice recorder (CVR) related to the January 29 midair collision near Reagan National Airport between a U.S. Army Black Hawk helicopter and a PSA Airlines CRJ regional jet. The Black Hawk was conducting a checkride with night vision goggles and was following FAA-designated helicopter routes. The CRJ was cleared for a visual approach to Runway 33.

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The investigation revealed discrepancies in altitude readings from the Black Hawk’s instruments, raising concerns about possible erroneous altimeter data. At 8:47:40 PM, the CRJ received an automated traffic advisory, and the tower instructed the Black Hawk to pass behind the CRJ. However, due to a transmission overlap, the Black Hawk may not have received the full instruction. Seconds later, the aircraft collided at approximately 313 feet altitude.

The NTSB is conducting a visibility study, examining night vision goggle effects, air traffic control communications, and ADS-B transmission issues. The agency commended the FAA’s temporary helicopter flight restrictions but has not determined if permanent changes are necessary. The full investigation is ongoing, with additional findings expected in the final report.

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