As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT AND PAX REPORTED NOISE COMING FROM OUTSIDE OF R1 DOOR TO SEAT 2B ON DESCENT. ODD NOISE WAS INTERMITTENT. MOST OF THE TIME CHILLER SOUNDED FINE THEN STARTED TO SOUND LIKE A HELICOPTER. REPLACED CHILLER, OP CHECKED GOOD.