As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING ROLLOUT NOSE GEAR COLLAPED. INVESTIGATION INDICATED ACTUATOR CONTAMINATED BY WATER. CHEVRON SEALS WORN, AND DOWN LOCK SWITCH DETERIORATED. SUSPECT ACTUATOR FROZE IN FLIGHT FROM COLD TEMPERATURES. ACTUATOR OVERHAULED. NO FURTHER PROBLEM.