As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND CREW REPORTED STRONG SMOKE SMELL IN COCKPIT AND FORWARD CABIN. FOLLOWED CHECKLIST AND COULD NOT DETERMINE SOURCE. INSPECTED AVIONICS RACK AIR DISTRIBUTION SYSTEM. PERFORMED OPERATIONAL CHECK OF THE BLEED AND AIR DISTRIBUTION SYSTEM WITH NO DISCREPANCIES NOTED. A/C RETURNED TO SERVICE. (M)