As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 36000FT. DUCT 2 OVERHEAT. FOLLOWED CHECKLIST. DUCT ONE OVERHEAT SHORTLY AFTER. INSTALLED A NEW NR 1 DUCT TEMPERATURE SENSOR AND NEW ECS TEMPERATURE CONTROLLER IAW MM 21-61-03 AND MM 21-61-01. OPS CHECKS PERFORMED MM 21-61-00-710-801A/500. OPS CHECKED GOOD.