The function is reset once angle of attack falls below the Angle of Attack threshold or if manual stabilizer commands are provided by the flight crew. If the original elevated AOA condition persists, the MCAS function commands another incremental stabilizer nose down command according to current aircraft Mach number at actuation.
To summarise; MCAS will trim the Stabilizer down for up to 9.26 seconds (2.5 deg nose down) and pause for 5 seconds and repeat if the conditions (high angle of attack, flaps up and autopilot disengaged) continue to be met. MCAS will turn the trim wheel. Using electric pitch trim will only pause MCAS for 5s; to deactivate it you need to switch off the STAB TRIM CUTOUT switches.
Angle of attack pmdg 737 NGX-torrent.zip
Air speed, attitude, altitude, vertical speed, heading and engine power settings are the primary parameters the flight crews use to safely operate the airplane in normal flight. Stick shaker and the pitch limit indicator are the primary features used for the operation of the airplane at elevated angles of attack. All recommended pilot actions, checklists, and training are based upon these primary indicators. Neither the angle of attack indicator nor the AOA Disagree alert are necessary for the safe operation of the airplane. They provide supplemental information only, and have never been considered safety features on commercial jet transport airplanes.
Boeing is issuing a display system software update, to implement the AOA Disagree alert as a standard, standalone feature before the MAX returns to service. When the MAX returns to service, all MAX production aircraft will have an activated and operable AOA Disagree alert and an optional angle of attack indicator. All customers with previously delivered MAX airplanes will have the ability to activate the AOA Disagree alert."
Following the Lion Air accident, on 7 Nov 2018 the FAA issued an Emergency AD (2018-23-51) and Boeing issue an Ops Manual Bulletin (TBC-19) for MAX Runaway Stabilizer procedure directing operators to existing flight crew procedures" to address circumstances involving erroneous angle-of-attack sensor information.
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Hi folks, I know that this post is very old but I found a pretty easy way to fix this problem, so I'm gonna leave it here because may there to be people that still look for the answer. It's just open the aircraft.cfg file (it must be done to every aircraft that present this problem), search for cruise_lift_scalar that must have value 1.0 and change that to something around 2.5, so the nose angle will be reduced twice and a half of the current attack angle while at cruise altitude. Change also the following values: elevator_trim_effectiveness=1.5 and elevator_effectiveness=1.5. These values belong to the [Flight_Tuning] session. Hope I've helped. PS: Don't insert a value superior to 2.5 in cruise_lift or, below the cruise altitude, the airplane may point the nose down, 2.5 leads the simulation very close to reality, because real planes fly in cruise altitude with a nose angle around 1.5 and 2.5 to keep lift. ?
On 27 November 2008, an aircraft on a post-maintenance test flight operating as XL Airways Germany Flight 888T stalls and crashes into the Mediterranean Sea off the coast of France, killing all seven people on board. Improper maintenance work allowed water to enter the aircraft's angle of attack (AOA) sensors; the water then froze during flight, and the sensors stopped working. When the crew tried to test the stall warning system during flight, the aircraft stalled.
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