What was found
CREW REPORTED AN NOXIOUS FUMES/ODOR IN THE CABIN WHEN SHUTTING DOWN THE ENGINE AND STARTING THE APU. MAINTENANCE NOTIFIED AND STATION PERSONNEL ALSO REPORTED SMELLING A STRANGE ODOR ON THE AIRCRAFT. MAINTENANCE HAS BEEN NOTIFIED AND WILL INSPECT THE AIRCRAFT IN THE MORNING WHEN A CREW IS AVAILABLE TO RUN THE ENGINES. NO PASSENGER/CREW ISSUES REPORTED. PERFORMED ENGINE DRY OUT PROCEDURE IAW CRJ700 AMM 72-00-00-100-803-A01-PSA STEPS 6-20. COULD NOT REPRODUCE ANY ODORS INSIDE OR OUTSIDE OF AIRCRAFT. AIRCRAFT REQUIRES OCF DUE TO SUSPICIOUS ODOR. NO SUSPICIOUS ODOR DETECTED.