As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RPTD SMOKE SMELL IN CABIN AND FLIGHT DECK FUMES/BURNINFG SMELL IN COCKPIT AFTER TAKE OFF ALSO IN CABIN DISSIPATED BUT RETURNED AFTER APU WAS TURNED ON POST LANDING.-C/A-C/W FIM 21-20-00-810-801-A ODOR ACCURED AFTER APU START PER SUB TASK 810-035-A DEFFERED APU MEL 4901 AUTH010661DMC