As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRSHUTTLE FL 7902 - SEA-PDX - AIRCRAFT WAS EN ROUTE TO PDX WHEN THE CREW NOTICED A BURNING SMELL FROM THE EYEBALL VENTS. SHUTOFF VENT BLOWERS AND THE SMELL DISSIPATED IMMEDIATELY. AIRCRAFT LANDED IN PDX WITH NO FURTHER INCIDENTS. MAINTENANCE INSPECTED THE VENT BLOWER SYSTEM AND COULD NOT DUPLICATE THE DISCREPANCY. AIRCRAFT WAS RETURNED TO SERVICE. (M)