As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORT "AFTER ILLUMINATION OF THE HYD2 AND SERVO LIGHTS, NURSE AND MEDIC SAW WHITISH GRAY SMOKE FROM VICINITY IN FRONT OF THE CABIN TDFM RADIO CONTROL HEAD, NEAR THE O2 SHUT-OFF LEVER. I SMELLED A BURNT RUBBER SMELL BUT NEVER SAW ANY SMOKE WHEN I LOOKED DOWN AND TO MY RIGHT. THEY SPECIFICALLY STATED IT WAS NOT ACCUMULATING OR SPREADING IN THE CABIN. UPON ARRIVAL FOUND BELT DRIVEN HYDRAULIC PUMP DRIVE ASSY BEARING TO BE SEIZED CAUSING THE BELT TO MELT AND BREAK CAUSING THE SLIGHT SMOKE AND SMELL IN THE CABIN