As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - LT PACK INOP LIGHT ILLUMINATED, EICAS MSG LT PACK TEMP DISPLAYED. OPERATED NORM AFTER STBY SELECTED. T/S IAW FIM 21-51-00 FIGS 103 AND 104. DID BITE OF PACK TEMP CONTROLLER. NO FAULTS. RAN PACK FOR APPROX 1.5 HOURS. LT PACK OPERATION NORMAL. NO MSGS OR FAULTS. OK FOR SERVICE.