As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INFLIGHT A SLIGHT WHISTLING SOUND WAS HEARD COMING FROM THE FLOOR/WALL AREA NEAR ROW 23 ON THE LT SIDE OF THE ACFT. THE FLIGHT CREW REPORTED NO FLIGHT DECK EFFECTS AND NO PRESSURIZATION ISSUES WITH THE ACFT. THE FLIGHT WAS DIVERTED THE WASTE VACUUM BLOWER MOTOR WAS FOUND TO BE AT FAULT AND REPLACED WITH NO FURTHER ISSUES REPORTED.