As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDU - FLT 4624 - CREW REPORTED WHILE ON THE GROUND THE LAVATORY SMOKE DETECTOR WENT OFF WITHOUT ANY VISUAL INDICATION OF SMOKE. THERE WAS A STRONG BURNING ODOR IN LAVATORY. MAINTENANCE REMOVED AND REPLACED A BALLAST CONVERTER IN LABATORY IAW EMB MM. AIRCRAFT WAS THEN RETURNED TO SERVICE. (M)