As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR FLIGHT 2526 THE CREW REPORTED SMOKE IN THE COCKPIT AND CABIN AFTER PUSHBACK. MAINTENANCE INSPECTED AND REPLACED THE APU. THE APU WAS SEIZED AND CAUSED BURNING SMELL IN COCKPIT AND CABIN. OPERATIONAL CHECKS WERE GOOD. THE APU WAS REMOVED FROM MEL.