As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT THE CREW NOTED AN ELECTRICAL/WOOD SMOKE SMELL IN COCKPIT. AIRCRAFT WAS LANDED WITH NO OTHER PROBLEMS NOTED. MAINTENANCE COULD NOT DUPLICATE THE DISCREPANCY. GROUND RUN OF AIRCRAFT WAS SATISFACTORY. ISOLATED BOTH BLEED SYSTEMS DURING RUNS AND FOUND NO SMELL AT ANY TIME. AIRCRAFT RETURNED TO SERVICE.