As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4930 - IAD CREW REJECTED TAKE OFF DUE TO SMOKE IN COCKPIT. SMOKE OCCURRED WHEN THRUST WAS ADVANCED TO DETENT. SMOKE CLEARED WHEN THRUST WAS REDUCED AND AFTER ENGINES WERE SHUT DOWN. SMOKE WAS A BLUE/GRAY COLOR. IAD MX RAN NR 1 & 2 ENGINES WITH PAKS TO PURGE THE SYSTEM OF RESIDUAL DE-ICING FLUID. NO MORE SMOKE FOUND AT THIS TIME. ACFT WAS APPROVED TO RETURN TO SERVICE. 02-26-2007.