As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2506 - THE FLIGHT RETURNED TO FIELD WHEN AFTER TAKEOFF THE FLIGHT ATTENDANT REPORTED A STRONG BURNING/HOT SMELL IN THE CABIN. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE RT DUAL HEAT EXCHANGER. OPERATIONAL CHECKS WERE GOOD AND THE A/C WAS RETURNED TO SERVICE.