Investigators have also proposed that the pilots themselves could have switched the plane’s communication equipment off and redirected the plane west, but officials say it would have been very difficult for them to make the plane disappear from radar. Commercial aviation pilots who spoke with NPR said shutting down the system, which is designed to automatically communicate with ground control stations, is far more complicated than throwing a single switch.
“They said you'd have to go through big checklists, you'd have to possibly pull circuit breakers if you wanted to deactivate [all the communications equipment],” NPR’s Geoff Brumfiel told “All Things Considered” host Robert Siegel. “So, to do this, you'd have to have some degree of premeditation and a lot of knowledge of the aircraft.”
Further evidence supporting the cyber hijack theory comes from the fact that Boeing had previously expressed concern over the security of the plane’s systems, and had even contacted the U.S. Federal Aviation Administration for permission to change some of the onboard equipment. In August 2017, Boeing applied to have additional security installed aboard several of its 777 series aircraft.
Boeing was concerned that the aircrafts’ inflight entertainment system, which includes USB connections, could allow hackers to access a plane’s computer. The Federal Aviation Administration granted Boeing permission to change its inflight systems five months ago.
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