As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2322 - EWR - DURING TAXIING OUT OF THE GATE, CREW REPORTED A BURNING ODOR IN CABIN AND GALLEY AREA. CREW RETURNED TO GATE AND EWR MX FOUND BALLAST IN GALLEY AREA DEFECTIVE. MX REMOVED AND REPLACED BALLAST IN GALLEY AREA AND PERFORMED OPERATIONAL TEST SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.