What was found
UPON APPROACH, THE RT MLG DID NOT DISPLAY GREEN INDICATION, ONLY RED. CREW EXECUTED MISSED APPROACH AND REVIEWED COM PROCEDURES. CREW DIVERTED AND DECLARED AN EMERGENCY INBOUND. CREW FOLLOWED COM PROCEDURES FOR MANUAL EXTENSION OF GEAR AND SECONDARY SYS SHOWED A GREEN LIGHT BUT RED LIGHT REMAINED ILLUMINATED. THE GEAR WARNING HORN WAS SILENCED BY PULLING THE GEAR WARNING HORN CIRCUIT BREAKER. THE ACFT LANDED WITHOUT FURTHER INCIDENT, STOPPED ON RUNWAY AND A CREW MEMBER PINNED THE RT GEAR. THE ACFT WAS SUBSEQUENTLY FLOWN UNDER SPECIAL FLIGHT PERMIT BACK TO MAIN BASE. MX R & R THE RT MLG DOWNLOCK SWITCH IAW MM 32-30-0. THE OPS CHECK WAS GOOD. MX ALSO REPLACED THE LT MLG DOWNLOCK PROXIMITY SWITCH IAW MM 32-30-0. THE OPS CHECK WAS GOOD AND THE ACFT WAS RETURNED TO SERVICE AFTER GEAR SWINGS.