As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE FLIGHT CREW NOTICED A LOUD BANG AND STRONG FLUTTER FROM THE NOSE LANDING GEAR DOOR AREA. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NOSE LANDING GEAR STOP CABLE AND NOSE LANDING GEAR DOOR. OPERATIONAL CHECK NORMAL.