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 OFF LIGHT ILLUMINATED IN CRUISE FLIGHT FOR APPROX 2 MIN WITH ASSOCIATED EICAS MESSAGE. LIGHT EXITING AND OPS RETURNED TO NORMAL. PERFORMED PACK BITE CHECK IAW FIM 21-51-00/100, FIG 103, NO FAULTS FOUND PACK, OPS CHECKS NORMAL.