What was found
RIGHT MAIN A LIGHT ON LANDING GEAR REMAINED ILLUMINATED AFTER T/O WITH CORRESPONDING VIBRATION SIMILAR TO GEAR BEING DOWN. RETURNED TO FIELD. INSPECTED AND ADJUSTED RT MLG UPLOCK PROXIMITY TARGET. ALSO REPLACED LDG RELAY BOX AND LDG SELECTOR BOX. PERFORMED NUMEROUS GEAR SWINGS. GROUND CHECK NORMAL. RELAY BOX P/N: 120-43270-501, S/N ON: 120154, S/N OFF: 120290. SELECTOR BOX P/N ON: 120-25226-501, S/N ON: 120039, P/N OFF: 120-38594-301, S/N OFF: 137101-304.