As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, R1 WINDOW HEAT EICAS WITH WINDOW CRACKING.. AIRCRAFT RETURNED TO CVG. (ATB). MTX GROUNDED AC . REMOVED AND REPLACED R1 WINDOW AND WINDOW HEAT CONTROLLER IAW B767 AMM 56-11-01 AND B767 AMM 30-41-01 OPS CHECK GOOD MTX RETURNED AC TO SERVICE.