What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot of N2120X reported a landing gear anomaly while on approach to kdec when he noticed that the landing gear circuit breaker had tripped and could not be reset. The pilot conducted a manual landing gear extension to lower the landing gear. The aircraft landed without incident but as the aircraft was exiting the runway, the left main landing gear assembly began a partial retraction resulting in the aircraft unable to taxi clear of the runway. The aircraft engine was shut down and additional support was summoned. In subsequent inspection of the aircraft, it was determined that the 'down link' mechanism showed signs of failure.
As the FAA filed it
THE PILOT OF N2120X REPORTED A LANDING GEAR ANOMALY WHILE ON APPROACH TO KDEC WHEN HE NOTICED THAT THE LANDING GEAR CIRCUIT BREAKER HAD TRIPPED AND COULD NOT BE RESET. THE PILOT CONDUCTED A MANUAL LANDING GEAR EXTENSION TO LOWER THE LANDING GEAR. THE AIRCRAFT LANDED WITHOUT INCIDENT BUT AS THE AIRCRAFT WAS EXITING THE RUNWAY, THE LEFT MAIN LANDING GEAR ASSEMBLY BEGAN A PARTIAL RETRACTION RESULTING IN THE AIRCRAFT UNABLE TO TAXI CLEAR OF THE RUNWAY. THE AIRCRAFT ENGINE WAS SHUT DOWN AND ADDITIONAL SUPPORT WAS SUMMONED. IN SUBSEQUENT INSPECTION OF THE AIRCRAFT, IT WAS DETERMINED THAT THE 'DOWN LINK' MECHANISM SHOWED SIGNS OF FAILURE.