STALL FAIL in flight with probe heat on

[dlrk]

Intermittently during flight in icing conditions, even with the probe heat on, a STALL FAIL warning comes up. It goes away after a minute or so.

[Graeme_77]

Thanks. Will need to be checked. Can you provide a rough idea of the weather conditions when the STALL FAIL message was seen?

 

 

[dlrk]

It was below -10C in clouds

[sho69607]

I can report this issue shortly after takeoff and approaching cruise altitude (no clouds).

[JRBarrett]

I don’t know how thoroughly the failure conditions for the stall warning system are emulated in the sim, but in the  real aircraft, the airspeeds reported by the number 1 and 2 ADCs and the standby instrument must all match. On the CRJ, they must all be within 2 knots of each other - I assume the tolerances on the 650 are similar. Also the left and right AOA vanes must match within 1 degree. If the problem occurs in icing conditions there could be an airspeed or AOA disparity. Check the airspeeds on the left and right PFD and the standby instrument, as well as the AOA on the two PFDs

Edited January 16, 2022 by JRBarrett