As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR WOULD NOT LOCK DOWN. CRANKED GEAR DOWN MANUALLY AND HAD NORMAL LANDING. DID NOT GET GREEN NOSE GEAR LIGHT, RED LIGHT STAYED ON. *S/D* FOUND NOSE LANDING GEAR POSITION SWITCH LINKAGE RIVET SHEARED AND LINKAGE BENT. REPLACED POSITION SWITCH AND LINKAGE. JACKED AIRCRAFT AND OPERATED NLG SEVERAL TIMES. ALSO, TESTED NLG MANUAL EXTENSION SYSTEM, ALL OPERATIONS NORMAL.