As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INITIAL TAKEOFF LANDING GEAR HANDLE WAS RAISED AND RECEIVED GEAR DISAGREE CAS MESSAGE ALONG WITH PROX SYS FAULT MESSAGE. B3 CODE 007504. TOWER CONFIRMED ALL GEAR WERE IN THE UP POSITION WITH THE GEAR HANDLE UP. GEAR INDICATIONS SHOWED RIGHT MAIN AND NOSE UP AND LEFT GEAR DOWN. REMOVED RH MLG DOWNLOCK SENSOR PX08 HARNESS ASSEMBLY AND INSTALLED CUSTOMER SUPPLIED NEW RH MLG DOWNLOCK SENSOR PX08 HARNESS ASSEMBLY WORK IN REF. TO AMM 32-32-09.