As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER INCREASING THRUST LEVERS TO 70% SMOKE AND HAZE BEGAN TO FILL THE COCKPIT; AIRCRAFT GROUND INTERRUPTED BACK TO GATE SAFELY AT ORD. PERFMORD J/C 08L00021001, COULD NOT REPLICATE SMELL, DE-ICE FLUID WAS HEAVILY PREVELANT AROUND APU AMD ENGINE INLETS. NO DEFECTS NOTED. NO FAULT FOUND.