As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT PERFORMED A PRECAUTIONARY LANDING FOR SMOKE IN THE CABIN AFTER LIFTING OFF WITH A PATIENT ON BOARD. MECHANIC PERFORMED EXTENSIVE TROUBLESHOOTING ON MULTIPLE SYSTEMS AND COULD NOT DUPLICATE DURING OPS CHECK RUN. NO DISCREPANCY NOTED.