As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW SELECTED GEAR DOWN AND GOT THREE RED LIGHTS. DIVERTED THE LANDING AND TRIED THE ALTERNATE GEAR EXTENSION, WHICH BROUGHT THE LANDING GEAR DOWN WITH 3 GREEN LIGHT. INSP INHIBIT SWITCH, L/G SELECTOR VALVE C/P AND WIRING, NO DEFECTS NOTED. REMOVED AND REPLACED L/G SELECTOR HANDLE. CYCLED GEAR TEN TIMES. CHECKED MEMORY ON PSEU, NO FAULTS. OPS CHECK GOOD.