As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUS - CREW REPORTED AIRFRAME VIBRATION AT FORWARD LANDING GEAR. RETURNED TUS WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND EXTERIOR POWER NOSE GEAR DOORS WITH LOOSE HINGE PIN. REPLACED BOTH FORWARD NOSE GEAR DOORS AND ADJUSTED. SYSTEM GROUND CHECK NORMAL OPERATION.