As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MFR FLIGHT NR 2125 - UPON LEVEL OFF AT FL190, NOTICED UNUSUAL ODOR ACCOMPANIED BY AIRCRAFT NOT PRESSURIZING PROPERLY. CABIN CONTINUED TO CLIMB AND CABIN ALTITUDE APPROACHED 8000. MAINTENANCE REPLACED AIR CYCLE MACHINE. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.