As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE STALL WARNING SYSTEM ACTIVATED. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURES AND THE STALL WARNING SYSTEM CONTINUED TO ACTIVATE. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED LEFT FLAP POSITION TRANSMITTER AND OPERATIONAL CHECK GOOD.