As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7672 - SLC TO SLC - FLIGHT CREW REPORTED SMOKE IN CABIN AND COCKPIT. MX PERSONNEL PERFORMED OPERATIONAL CHECK OF THE ENGINE TO DUPLICATED, BUT COULD NEVER DUPLICATE FAULT AGAIN. SUSPECTED DEICING FLUID. A/C WAS RELEASED TO RETURN FOR SERVICE IN AIRWORTHY CONDITIONS.