As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3705 THE CREW REPORTED A SMELL OF SMOKE IN THE CABIN DURING CLIMB. THE AIRCRAFT RETURNED TO CLEVELAND WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND FOUND NR 2 PACK SYSTEM CAUSING THE SMELL IN THE CABIN. THE SYSTEM WAS PLACED ON MEL. THE AIRCRAFT WAS RETURNED TO SERVICE.