As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE TAXIING TO POSITION FOR DEPARTURE THE CREW OBSERVED AN ICE DETECTOR FAULT. THE AIRCRAFT RETURNED TO THE RAMP FOR TROUBLESHOOTING. MAINTENANCE REPLACED THE CAPTAINS ALPHA PROBE AND THE AIRCRAFT WAS RETURNED TO SERVICE. (TC NR 20070426008)