As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG "GEAR MONITOR" SHOWS PREDEPARTURE. SUSPECT FAULTY GEAR CONTROL MODULE. REPLACED LANDING GEAR CONTROL HANDLE MODULE PER MM 32-31-01 PAGE 414 PAR H(17). COMPLETE OPERATIONAL CHECKS NORMAL AFTER CMC PSEU TESTS FOR PRIMARY AND ALT SENSOR TESTS PASSED. AC OK FOR SERVICE.