As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3301 THE CREW REPORTED A GLYCOL SMELL AND SMOKE IN THE CABIN ON CLIMBOUT. THE AIRCRAFT RETURNED TO CLEVELAND AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND FOUND GLYCOL IN THE APU INLET AND THE INLET WAS MISALIGNED. THE GLYCOL WAS CLEANED UP AND THE INLET WAS ALIGNED. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.