As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION WAS COMING FROM NOSE GEAR AREA AFTER TAKEOFF. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND RIGHT NOSE GEAR DOOR STOP CABLE BROKEN AND DAMAGE TO SHEET METAL ON RIGHT GEAR DOOR AT HINGE POINT AREA NEAR DOOR GROUND LOCK ACTUATOR. REPLACED DOOR STOP CABLE AND DOOR, OPERATIONAL CHECK NORMAL.