As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEPARTURE FROM MSP, THE CREW FOUND THE LT ENGINE AIR INTAKE HEAT SYSTEM CYCLING ABNORMALLY. THE FLIGHT RETURNED TO MSP WITHOUT INCIDENT. REPLACED UPPER DUCT ASSY AND REPAIRED CHAFED WIRE AT INLET PROTECTION DEVICE. OPS CHECK GOOD.