As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IT WAS REPORTED FROM OPERATOR AIRCRAFT RETURNED TO GATE WITH LOSS NR 1 TRU, & ANTI-ICE CAUTION LIGHTS ON. MAINTENANCE REPORTS, DISCOVERING SOME OVERHEATING OF BUS BAR T4 & K6, THESE PARTS & ASSOCIATED HARDWARE WERE REPLACED & AIRCRAFT RETURNED TO SERVICE.