As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEPARTED MROC ENROUTE TO KFLL AT FL340 AIRCRAFT STARTED MAKING A LOUD RUMBLING AND AIR NOISE, FOLLOWED BY ELECTRICAL SMELL IN COCKPIT AND FLIGHT CABIN AROUND ROW 22 WE CONTINUED ON TOWARDS KFLL AND SOUND GOT CONSIDERABLY LOUDER. WE PROCEEDED TO MWCR (GRAND CAYMAN) AS A PRECAUTIONARY DIVERSION DUE TO FUMES AND SOUND.-REF TSM 05-50-00-810-831. FOUND BLOWER FAN (20HQ) AT FAULT. DAMAGED.