As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT ATTENDANTS REPORT AN ELECTRICAL BURNING ODOR FROM LAVATORY 4L. NO SMOKE WAS OBSERVED AND THE ODOR SEEMED TO COME AND GO. REMOVED AND REPLACED LAVATORY LIGHT ASSEMBLY AND BALLAST (AALA202206062916) PER AMM 33-26-00.