As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABOVE 80 KTS ON T/O ROLL FO'S MASTER WARN LIGHT AND MWS FAULT LIGHT ILLUMINATED CONTINUED ROLL AND RETURNED TO DETROIT. MWS SYSTEM OPS CHECK GOOD DURING TROUBLESHOOTING FOUND ELEVATOR TRIM INOP. TRIM WAS REPAIRED WITH DFGC SYSTEM OPS CHECK GOOD. REQ TEST RUN FOR OPS CHECK OF FO'S MWS SYSTEM