As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORT THAT THERE WAS A PLASTIC BURNING ODOR COMING FROM ROWS 11 TO 30. MOST PROMINENT DURING TAKEOFF AND DESCENT. MAINTENANCE FOUND THE APU LEAKING AND REPLACED THE FCU PER AMM 49-32-11 AND THE LUBE MODULE PER AMM 49-91-45.