As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - GEAR DISAGREE LIGHT ON RIGHT MAIN GEAR DOWN LIGHT DID NOT ILLUMINATE WITH GEAR HANDLE DOWN. RECYCLED GEAR, NO HELP. PUSHED RIGHT MAIN GEAR DOWN LIGHT AGAIN AND LIGHT ILLUMINATED. FLY BY SHOWED GEAR DOWN. LANDED DFW WITHOUT INCIDENT. REPLACED GEAR HANDLE MODULE. SYSTEM GROUND CHECKED NORMAL OPERATION.