As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT ODOR BURNING SMELL - AFTER TAXI OUT, WE SMELLED A SMOKY ODOR COMING FROM OVERHEAD GASPER VENTS. OPENED COCKPIT WINDOW TO VERIFY IT WAS NOT AN OUTSIDE SOURCE. WHEN WE WENT INTO CABIN TO CHECK, THE FRONT OVERHEAD VENTS HAD THE ODOR EVEN STRONGER. CLEANED AND DRIED BOTH CONVERTERS AND SOCKS.