As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TAXING TO TAKE OFF THE ITT INDICATOR FELL TO ZERO. THE PIC INFORMED CONTROL HE NEEDED TO RETURN TO MAINTENANCE. MAINTENANCE INSPECTED ITT SYSTEM AND FOUND POWER WIRE LEADING TO ITT INDICATOR CHAFED. THE WIRE WAS REPAIRED, SYSTEM CHECKED AND AIRCRAFT RETURNED TO SERVICE.