Originally Posted by
SLF3
If it silences 'all alarms' how are the pilots supposed to figure out what they are dealing with?
https://www.skybrary.aero/index.php/...ht_Instruments
A limited range of electromechanical instruments are normally provided as back-up; alternatively, electronic standby flight instrument displays may be provided. Standby systems are fed from independent power supplies and sensors to ensure continuity of operation in the event of main system failure.
Presumably standby instruments are not affected by AOA failure, and things like unreliable airspeed, and false stall warning are silenced.
Originally Posted by
DaveReidUK
Wasn't the AoA indication on the PFD (presumably with each side driven independently) a payable option on the MAX from the start, albeit one that few, if any, operators took up ?
IIRC, it was bundled with the "AOA DISAGREE" annunciation option.
Edit: AOA disagree was a tiny part of the primary flight display, not a big red screen that says ignore all spurious warnings...