As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE ALTITUDE 35000 FT. UNKNOWN SOURCE OF FUMES IN COCKPIT. FOUND HYD PANEL C2 ELECTRICAL PUMP SWITCH SHORTED. R & R THE HYD CONTROL PANEL. OPS CHECKED IAW AMM 29-11. CHECKED PANEL LIGHTING POWER IAW WDM 29-00-04. CK OK. NO OTHER FAULTS NOTED.