Originally Posted by
khorton
I'll take this design over the earlier Collins AHRS, which only used pitot-static inputs to help stabilize the AHRS attitude. There have been more than one event of pitot icing on CRJs leading to significant errors in the attitude outputs from the AHRS, and loss of all air data output to PFDs. Having the L PFD, R PFD and the standby all showing significantly different attitudes, with no valid airspeed info and altitude info displayed only on the standby is not a great situation to deal with.
I can see your point.
I wonder if there is a way to design any critical system depending on GPS in such a way that it is able to detect loss of signal accuracy?