What was found
DURING APPROACH AFTER GEAR SELECTED DOWN, RT MLG GREEN DOWN LIGHT DID NOT ILLUMINATE. CREW PERFORMED LIGHT TEST AND RT MLG GREEN DOWN LIGHTS DID NOT ILLUMINATE. AS A PRECAUTION CREW DID TOWER FLY BY FOR GEAR VERIFICATION AND ALSO PERFORMED MANUAL GEAR EXTENSION BLOW DOWN PROCEDURE. CHECKLIST FOLLOWED, EMERGENCY DECLARED, AND UNEVENTFUL LANDING PERFORMED. MAINTENANCE EVALUATION FOUND RT MLG GREEN DOWN LIGHTS NOT ILLUMINATING. GEAR HANDLE INDICATOR BULBS P/N 387 WERE REPLACED. PERFORMED SYSTEM OPERATION CHECKS, NO DISCREPANCIES FOUND, SYSTEM OPS CHECK GOOD.