As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STALL INDICATION FAILURE LIGHT ILLUMINATED AFTER TAKEOFF. FLIGHT WAS RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND CROSS MONITOR PINS DOWN ON BOTH STALL WARNING COMPUTERS. RESET PINS. ALSO, REPLACED STALL WARNING TONE GENERATOR, OPERATIONAL CHECK NORMAL.