What was found
RT MAIN MLG LIGHT INDICATOR INOPERATIVE. AMM 32-61-00-5-0, AMM 20-84-18, AMM 20-60-01, ON ENTRY TO FLT DECK, THE RT MLG INDICATOR WAS NOT ILLUMINATED (GREEN). CAPT SHOWED THAT INITIATING LIGHT TEST, ALSO NO GREEN RT MLG LIGHT. REMOVED THE MODULE & CLEANED THE CONTACTS, REPLACED BOTH 387 LAMPS ON RT MLG LIGHT MODULE. REINSTALLED & BOTH LIGHTS ON INDICATOR ILLUMINATED NORMAL. TEST FUNCTION OPS NORMAL.