Was Nosediving Boeing Plane Caused By a Flight Attendant Hitting a Motorized Seat Switch?

Last week 50 people were injured when a Boeing 787-9 Dreamliner experienced a sudden mid-air drop - raising concerns about the possibility of a new safety issue. But the Wall Street Journal offers a follow-up report. "A flight attendant hit a switch on the pilot's seat while serving a meal, leading a motorized feature to push the pilot into the controls and push down the plane's nose, according to U.S. industry officials briefed on preliminary evidence from an investigation." The switch, on the back of the chair, is usually covered and isn't supposed to be used when a pilot is in the seat. Boeing issued a memo late Thursday to operators of 787 jets recommending that they inspect the cockpit chairs for loose covers on the switches and instructing them how to turn off power to the pilot seat motor if needed. Boeing said it is considering updates to flight crew manuals. "Closing the spring-loaded seat back switch guard onto a loose/detached rocker switch cap can potentially jam the rocker switch, resulting in unintended seat movement," according to the memo, which was viewed by The Wall Street Journal. The memo says this was a known issue and that Boeing had issued a related service notice in 2017.... American Airlines issued a notice to 787 captains advising them of the potential hazard. It asked them to instruct the crew not to use the switch while the chair is occupied and said that its maintenance teams would check that the switches are properly secured. Ipeco, the cockpit seat supplier, didn't respond to the Journal's request for a comment. But in a new CNN video, a pilot demonstrates the location of the button - and speculates that a seat pushing a pilot forward could abruptly override the plane's auto-pilot system. "It would be good news for Boeing if it is cleared of any fault in the Latam flight," adds another CNN report. "The company is facing multiple investigations by both the Federal Aviation Administration and the National Transportation Safety Board..." The Journal's article includes footage from inside the plane just moments after the incident and notes that some passengers had been "pinned to the ceiling as the airplane suddenly descended."

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