As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE OVERHEAD COCKPIT CLIMATE CONTROL UNIT EMITS A BURNING ODOR WHEN TURNED ON. THE CREW LANDED WITHOUT FURTHER INCIDENT. MX INSPECTED AND CLEANED THE OVERHEAD CLIMATE CONTROL UNIT FAN. OPS CHECK GOOD IAW MM 21-02. ACFT WAS RETURNED TO SERVICE.