As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED & ACFT WAS GNDED. VENT EXTRACT FAULT. RUMBLE & BURNT BEARING SMELL WAS NOTED DURING FLIGHT. CREW DECLARED AN EMER & DIVERTED WHERE THE ACFT LANDED WITHOUT FURTHER INCIDENT. REPLACED THE EXTRACT FAN & ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK IAW AMM 21-26-51.