As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD FLT 6144 THE CREW REPORTED A BURNING SMELL IN THE COCKPIT AND FORWARD CABIN ON TAXI IN. MAINTENANCE INSPECTED AND COULD NOT DUPLICATE ANY BURNING SMELL. OPERATIONAL CHECKS WERE GOOD IAW 21-20-00-810-801-1. THE SMELL WAS ALSO NOTED ON FLIGHT 5910. MAINTENANCE COULD NOT DUPLICATE ANY BURNING SMELL.