A CANADAIR CL-65 REJECTED TKOF AT 60 KNOTS DUE TO A STALL FAIL CAUTION MSG.

Narrative

DURING TKOF ON 24L IN DAY; WE RECEIVED A 'STALL FAIL' CAUTION MSG AT 60 KIAS. THIS RESULTED IN AN RTO. AFTER CLRING THE RWY WE DISCOVER THAT THE AIRLINE DESIGNATED THIS SIT ON SOME ACFT UNDER CERTAIN CONDITIONS TO BE NORMAL; AND THE TKOF MAY BE CONTINUED. WE THEN WAITED FOR BRAKE COOLING AND DEPARTED WITH THE SAME (APPARENTLY ERRONEOUS) MSG ILLUMINATING. I FEEL A PROB MAY BE IN THE WORKS BY ALLOWING THIS TO GO ON. WHAT IF IT IS A TRUE FAILURE? HOW ARE WE TO KNOW THE DIFFERENCE? CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE PROB IS A RECENT UPGRADE MODIFICATION TO THE STALL WARNING SYS THAT HAS BEEN ACCOMPLISHED ON ONE-HALF OF THE FLEET. THE RPTR SAID THE STALL WARNING COMPUTER SENSES THE SLIGHT DIFFERENCES OF THE STALL WARNING VANES UNDER CERTAIN CONDITIONS AND TRIGGERS THE 'STALL FAIL' CAUTION MSG. THE RPTR STATED THE FLT OPS MANUAL MAKES A NOTE OF THIS CONDITION AND ALLOWS THE CREW TO IGNORE THE WARNING OR REACT TO THE WARNING. THE RPTR SAID THIS IS CONFUSING AS THE CONDITION OF THE STALL WARNING SYS IS IN DOUBT. THE RPTR SAID THE AIRPLANE WITH THIS MODIFICATION IS NOT PLACARDED TO ALERT CREWS TO THIS SIT.