As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L PACK TEMP SHOWS INOP DURING TAXI AC RETURENED TO GATE AND MAINTENANCE GROUNDED AC .AND DEFERRED PACK FOR DEPARTURE IAW MEL ABX-21-51-3-1 AND RETURNED AC TO SERVICE.AC DEPARTED T/S SYSTEM FOUND BAD COMPRESSER OUTLET TEMP SENSOR FOR LH PACK R/R TEMP SENSOR WITH NEW IAW B767 AMM 21-52-01. SYSTEM WAS RAN AND OPERATION IS NORMAL. THIS CLEARS DI 48896. PLACARDS REMOVED. ACFT REMAINS NON ETOPS