As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT MADE AN AIR TURNBACK DUE TO NR 2 ENGINE ITT FLUCTUATION BETWEEN 600 TO 700 DEGREES DURING CLIMB. GROUND INSPECTION FOUND A LOOSE NUT ON THE TERMINAL WITH T6 WIRING HARNESS AT FLANGE "K". THE BOLT WAS RE-TORQUED AND ACFT RETURNED TO SERVICE.