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by WalterBright
1520 days ago
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> the Ethiopian pilots followed Boeing's guidelines on MCAS failure properly. The Ethiopian pilots did not follow the procedure in the Emergency Airworthiness Directive distributed to all MAX pilots that says: "Initially, higher control forces may be needed to overcome any
stabilizer nose down trim already applied. Electric stabilizer trim can be
used to neutralize control column pitch forces before moving the STAB
TRIM CUTOUT switches to CUTOUT. Manual stabilizer trim can be
used before and after the STAB TRIM CUTOUT switches are moved
to CUTOUT." https://theaircurrent.com/wp-content/uploads/2018/11/B737-MA... You might want to also read the report: 2018 - 035 - PK-LQP Final Report
http://knkt.dephub.go.id/knkt/ntsc_aviation/baru/2018%20-%20... And note that the first incident of MCAS failure was overcome by the pilots and the airplane landed safely. |
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The documentary talks about the Ethiopian crash from 32:00 onwards. The below excerpt is from 34:30 onwards. Name of the person talking is in '[]' brackets.
[Pasztor] Soon after the hearings got underway, we managed to get more information about what actually happened in the cockpit of the Ethiopian aircraft. We got the information from the FAA within hours after they received it from the Ethiopian investigators. It was very late at night, and we tried to put together the most comprehensive story we could. When it came out, this was the first story that revealed that the crew, in fact, realized that MCAS had kicked off. And they did what Boeing instructed them to do.
[Tajer] When the MCAS kicks in, it runs for ten seconds and pushes the airplane very powerfully nose-down. Runs for ten, off for five. Runs for ten, off for five.
[Cox] They’ve got this cacophony of stick shaker, master cautions, airspeed disagree, altitude disagree. All of these…these warnings going off. The captain, who’s flying the airplane, is trying to figure out what’s gone wrong.
[Tajer] The first officer called out, “Stab trim cutout switches, Captain.” I think he said it twice. He did what Boeing said. He turned off the MCAS system. I remember reading that, and I said, “Man, the kid got it right. The kid got it right”.
[Cox] The problem now is that the airplane is going too fast. And because of the force on the tail itself, they cannot manually trim the airplane to be able to recover.