As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3846 CREW NOTED A BURNING ODOR IN COCKPIT AND FWD PART OF CABIN. AC REMOVED FROM SERVICE. PERFORMED INSP OF AVIONICS RACK DOOR. RUN ENGINES TURN ON AIR CONDITIONING SYS, NO BURNING ODOR NOTED IAW AMM 05-50-00. AC RETURNED TO SERVICE. (K)