As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: MAINTENANCE WAS ACCOMPLISHING AN ETOPS PRE DEPARTURE CHECK, WITH AIRCRAFT ON GROUND POWER. APPROXIMATELY 15 MINUTES AFTER ARRIVAL, BURNING SMELL WITH FORWARD CARGO FIRE WARNING. SMOKE IN COCKPIT AND FORWARD CABIN. AIRCRAFT DE-POWERED AND EVACUATED. (OPEN)