What was found
ON DESCENT, MOVED GEAR HANDLE TO DOWN POSITION & RT GEAR GREEN ANNUNCIATOR DID NOT ILLUMINATE. MISSED APPROACH, CYCLED GEAR HANDLE, DECLARED AN EMER & DIVERTED. LANDING WAS UNEVENTFUL. REPLACED INOPERATIVE BULBS ON RT GEAR INDICATOR. ANNUNCIATOR TEST WAS GOOD & A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED. ACFT WAS RTS.