As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT WHEN FLAPS SELECTED TO 18 DEGREES, THE FLAP INOP AND FLAP FAULT LIGHTS ILLUMINATED. AIRCRAFT RETURNED TO DTW AND A NO FLAP LANDING MADE. MAINTENANCE RESET TORQUE LIMITER, REINSTATED NORMAL CONTROL. REPLACED FLAP CONTROL UNIT IAW AVRO AMM 27-50-17, 27-50-00. OPS CHECK GOOD.