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from the pulled-the-handbrake-as-hard-as-I-could dept.
A 2018 FAA (Federal Aviation Administration directive advised pilots to handle MCAS (Maneuvering Characteristics Augmentation System) failure by disabling electric control of stabilizer trim using a pair of cutout switches. Pilots would then need to use a hand crank to move the stabilizer back to the desired position. It's noted that previous 737 models had separate switches to disable autopilot and electric stabilizer control, but the 737 MAX lacked this distinction.
Avionics engineer Peter Lemme explains how aerodynamic forces acting on the stabilizer and elevator in a nose-down situation would oppose pilots' attempts to correct the trim using their manual control.
A 1982 Boeing 737-200 Pilot Training Manual acknowledges this possibility, describing a series of maneuvers which can be used to relieve force on the controls and allow incremental correction of trim. However, it's suggested that the Ethiopian Airline plane had already gained too much speed and lost too much altitude for such a maneuver to be possible.
https://www.moonofalabama.org/2019/04/ethiopian-airline-crash-boeing-and-faa-advice-to-737-max-pilots-was-insufficient-and-flawed.html
https://www.satcom.guru/2019/04/stabilizer-trim-loads-and-range.html
(Score: 0) by Anonymous Coward on Tuesday April 09 2019, @05:42PM
Yeah, bankruptcy is a good thing, works for getting out of their obligations. So the bill just goes on to another company's premium, brothers in arms and all that. And golden parachutes galore for the board of the bankrupt company, which will miraculously *rise from the ashes* like it never happened. You can hardly find a more crooked business than insurance...
Anyway, fuck this shit. It's offtopic, other than that big business fucks up insurance, and it fucks up airplane design. And you, trolling away, are always standing up for it. Still think you're just a clown.