As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4269 - CREW REPORTED SMOKE IN COCKPIT DURING CLIMB THEN CLEARED DURING APPROACH. MAINTENANCE COULD NOT DUPLICATE DISCEPANCY. SUSPECT THAT WHEN AIRCRAFT WAS DE-ICED FLUID GOT INTO AIR SYSTEM FROM APU INTAKE AREA. MAINTENANCE GROUND RAN AIRCRAFT AND HAD NO ABNORMAL INDICATIONS. AIRCRAFT WAS RETURNED TO SERVICE. (M)