As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: STRONG SMELL OF BURNING RUBBER ON TAKEOFF; AIRCRAFT AIR INTERRUPTED BACKTO AND LANDED SAFELY AT CVG. PERFORMED AND ACCOMPLISHED J/C 08L00021001 AND FOUND LEFT HAND PACK ACM STUCK, REMOVE AND REPLACED ACM PER JOBCARD 2123J009-001. OPERTIONAL CHECK GOOD. NO ODORS DURING PACK OR ENGINE RUNS.