What was found
AIRCRAFT WAS GROUNDED: AFTER LANDING, NUMBER 3 FLIGHT ATTENDANT ADVISED THAT DURING THE DESCENT BELOW 10000 FEET HE SMELLED BURNING RUBBER SMELL WHILE SEATED IN THE MID FLIGHT ATTENDANT JUMPSEAT. NUMBER 2 AND 4 FLIGHT ATTENDANTS REPORTED THAT UPON ARRIVAL AT THE GATE THEY HEARD A LOUD WHINING SOUND WHICH TURNED INTO A GRINDING SOUND WHICH ABRUPTLY STOPPED AND WAS IMMEDIATELY FOLLOWED BY A BURNING RUBBER SMELL. MAINTENANCE ACCOMPLISHED TASK CARD 26L00021001 AND FOUND TOILET VACUUM GENERATOR TO BE THE CAUSE OF GRINDING SOUND AND RUBBER BURNING SMELL. MAINTENANCE REPLACED THE TOILET VACUUM GENERATOR PER AMM 38-31-64 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL / LEACK CHECK WITH NO ISSUES OR ODORS NOTED.