As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MLG: UPON GEAR EXTENSION WE RECEIVED AN AMBER GEAR DISAGREE L AND OR R AND OR N CAS MESSAGE. EMER/ABNORMAL PROCEDURE COMPLETED AND GEAR EXTENDED VIA THAT PROCEDURE. CORRECTIVE ACTION: REPLACED LANDING GEAR HANDLE MODULE. OPS CHECK GOOD. IAW CESSNA MODEL CE-680A AMM 32-30-30.