The Federal Aviation Administration issued an emergency order grounding all Boeing 737 MAX plane on March 13, citing new knowledge that confirmed a attainable hyperlink between the March 10 crash of an Ethiopian Airways flight and the crash of a Lion Air flight off the coast of Indonesia final October. In an interview with NPR’s David Greene this morning, performing FAA Director Dan Ewell stated that “newly refined satellite tv for pc knowledge” from a flight telemetry system had led the company to make the transfer.
Each Ethiopian Airways Flight 302 (ET302) and Lion Air Flight 610 (JT610) have been just lately acquired 737 MAX eight plane, and each have been misplaced with all aboard simply minutes after take-off. In line with the emergency order issued by the FAA, “new data from the wreckage in regards to the plane’s configuration simply after takeoff that, taken along with newly refined knowledge from satellite-based monitoring of the plane’s flight path, signifies some similarities between the ET302 JT610 accidents that warrant additional investigation of the opportunity of a shared trigger for the 2 incidents that must be higher understood and addressed.”
The supply of the information in query is a mixture of telemetry feeds from the flights’ Automatic Dependent Surveillance(ADS) system. Launched within the US in 2001 and extra broadly worldwide within the wake of the crash of Malaysian Airlines flight 370 in 2014, Europe has required most plane to hold the UHF-band ADS-Broadcast (ADS-B) system since 2017, and the FAA has mandated ADS-B for many plane by 2020.
Whereas ADS-B knowledge was initially meant to be picked up by different plane and floor stations, additionally it is tracked by satellites. Different, less-granular telemetry knowledge despatched within the subscription-based ADS-addressed/Contract (ADS-A/ADS-C) format, the Future Air Navigation System(FANS), and the Aircraft Communications Addressing and Reporting System (ACARS) are additionally picked up by satellite tv for pc.
The investigation isn’t full, and a direct hyperlink between the crashes isn’t sure. Witnesses to the ET302 crash stated that they noticed smoke coming from the plane earlier than the crash. However the vertical pace profile of ET302 transmitted through the plane’s ADS-B telemetry confirmed the same sample of sudden dives to that of JT610. ADS-B data recorded for ET302 by FlightRadar24 reveals that the plane, after reaching an altitude of eight,025 toes, abruptly dipped, plunging 400 toes earlier than recovering briefly. However the plane’s vertical pace remained unstable, and some minutes later it dove into the bottom.
The broken flight knowledge recorder from ET302 has been despatched to France for additional evaluation. The FAA and Nationwide Transportation Security Board (NTSB) are supporting the investigation.