As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LFK - FLIGHT 3442, THE CREW REPORTED HEAVY SMOKE IN THE COCKPIT WITH AN ELECTRICAL SMELL. THE CREW DE-SELECTED PACKS AND PERFORMED AN EMERGENCY DESCENT. THE AIRCRAFT LANDED AT JFK WITHOUT INCIDENT WHERE MAINTENANCE PLACED THE NUMBER TWO PACK ON MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.