As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRAINING FLIGHT NO NOSE GEAR DOWN AND LOCKED INDICATION WHEN GEAR SELECTOR PLACED IN DOWN POSITION. CREW LANDED WITHOUT INCIDENT BUT UPON INSP BY MX THE DOWN LOCK ATTACHMENT TO THE DRAG LINK WAS FOUND BROKEN OFF. THE CRACKS STARTED FROM AN AREA HIDDEN BY THE DOWN LOCK ATTACHMENT. DRAG LINK WAS REPLACED AND ACFT RETURNED TO SERVICE.