What was found
NO GREEN (SAFE) RIGHT MLG LIGHT INDICATION WITH LANDING GEAR HANDLE DOWN....LIGHT TEST IS GOOD. ACCOMPLISHED ALTN PROCEDURE. NOTE: NO EICAS "GEAR DISAGREE" DISPLAYED NOT UNTIL ALTN PROCEDURES WAS ACCOMPLISHED. MAINT FOUND RIGHT MLG GREEN LIGHT REMAIN NOT ILLUMINATED WITH LANDING GEAR IS DOWN AND LOCK. AFTER T/SHT, FOUND LIGHT ASSY WAS NOT SEATED PROPERLY. AFTER SEATED LIGHT ASSY, R MLG GREEN ILLUMINATED. ALSO, DID ACCOMPLISHED PSEU BITE AS PRECATIONARY AND INSPECTED THE RMLG SENSORS. NOTE: ONLY FLIGHT DECK EFFECT IS GREEN LIGHT DID NOT ILLUMINATED WHEN GEAR IS DOWN AND LOCK. NO EICAS MSG WAS DISPLAYED DURING NORMAL GEAR RETRACTION.