As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMB OUT OF KRDU, FLIGHT ATTENDANTS REPORTED STRONG BURNING ODOR IN CABIN. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO KRDU WITHOUT FURTHER INCIDENT. DEBRIEF INDICATED NON ELECTRICAL OR OIL, SUSPECT PINE POLLEN. ACCOMPLISHED MCM CARD 21-96-01. NO ODOR NOTED. THE AIRCRAFT WAS GROUNDED.