As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SHUT DOWN, VERY STRONG BURNING RUBBER ODOR DETECTED COMING FROM OVERHEAD VENTS. AFTER SHUTDOWN INSPECTED AFT EQUIPMENT BAY AND NOTED VERY STRONG BURNING SMELL BUT COULD NOT DETERMINE WHICH COMPONENT. FOUND AIR CONDITIONING DRIVE MOTOR TO BE AT FAULT. REMOVED DEFECTIVE DRIVE MOTOR, INSTALLED OVERHAULED DRIVE MOTOR. ALL WORK PERFORMED IAW THE CESSNA 560 MM CHAPTER 21-52-00, PERFORMED ENGINE RUN UP, NO BURNING SMELL DETECTED.