As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SEEING SMOKE IN THE COCKPIT WITH A NR 1 PACK OVERHEAT INDICATION ON THE EICAS. MAINTENANCE PERFORMED A VISUAL INSPECTION OF THE NR 1 PACK AREA AND COULD FIND NO DISCREPANCIES. FOLLOWING THE INSPECTION, AN OPERATIONAL CHECK OF THE NR 1 PACK WAS PERFORMED AND THE DISCREPANCY COULD NOT BE DUPLICATED.