As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THERE IS AN ODOR IN THE COCKPIT OF EITHER BURNED WIRES OR BURNED PLASTIC. PERFORMED BOTH ENGINES RUN WITH ACFT SYS RUNNING AND ALL LIGHTS ON AND, NO ODOR OF BURNING NOTICED AT THIS TIME, DONE MORE THAN ONCE IAW -ATR-GHC-03-11 UNABLE TO DUPLICATE PROBLEM.