As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRANSIT CHECK, IT WAS DETECTED EICAS MSG L TEMP CONTROL INOPERATIVE. PERFORMED REVISION DETECTING THE CB P6-4 POS A1 WAS POPPED SO THE LT TEMPERATURE CONTROL WAS DEFERRED IAW MEL 21-19 CAT C. THE LT PACK CONTROLLER WAS REPLACED IAW AMM 21-51-31, TESTED CORRECT.