As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK TEMP EICAS IN THE DESCENT, QRH COULD NOT CLEAR IT(PERFORMED TS IAW FIM 21-51 FAULT TREE 847. NO FAULT NOTED. C/W PACK BITE W/ MIX MAN SENSOR LIGHT. TRANSFER TO DMI 142739 PER MEL 21-51-03-01, CAT C, DUE 03MAR21. REQ FURTHER TS WITH TECH SUPPORT. DATE 22FEB21- LP 1491841 ITEM 3 - CVG - PERFORMED SYSTEM TEST PER BOEING 767 FIM 21-51 FAULT TREE 844. SYSTEM OPERATIONAL TEST GOOD. NO DEFECTS NOTED AT THIS TIME. THIS ACTION CLEARS DMI 142739. PLACARD REMOVED. MCC NOTIFIED.)