As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER UNLOADING PASSENGER BAGGAGE IN THE AFT BAGGAGE COMPARTMENT, I NOTICED A BURNING ODOR. OPENED THE HELL HOLE. IT WAS EITHER AN ELECTRICAL OR RUBBER ODOR. WE USED THE AIR CONDITIONING CONTINUOUSLY IN THE DESCENT FROM 18,000 FT AND NEVER SMELLED ANYTHING. R & R MOTOR IAW CMM 8.8. OPS AND LEAK CHECKS GOOD.