What was found
AFTER LOWERING MLG ON APPROACH IN MEMPHIS, RT MLG LIGHT DID NOT ILLUMINATE. ALL OTHER INDS NORMAL. NO EICAS MSG. TOWER SAID MLG LOOKED NORMAL. TAPPED LENS & LIGHT WOULD FLICKER. DID A LIGHT TEST & LIGHT REMAINED OUT. AFTER FURTHER TROUBLE SHOOTING, LIGHT LENS HOUSING LOOKED LIKE WAS NOT FULLY SEATED. CAPT PUSHED HOUSING IN WITH MORE FORCE & LIGHT ILLUMINATED NORMAL. LANDED NORMALLY. EMERGENCY DECLARED. DETERMINED THE RT MLG WAS A INDICATION PROBLEM, AFTER CAPTAIN PUSHED ON LIGHT ASSY, PROBLEM FIXED. REMOVED RT MLG INDICATION CAP ASSY & INSPECTED. NO DEFECTS NOTED. RESEATED CAP ASSY & VERIFIED IT WAS SEATED & LATCHED IAW AMM 33-16-02-02. PERFORMED LIGHT TEST & LIGHT ASSY OPS CHECKED GOOD. ACFT OK