What was found
ON APPROACH, THE EAD DISPLAYED A WHITE BOX WITH "LANDING GEAR." THE "GEAR UNSAGE INDICATION WITH GEAR HANDLE DOWN," QRH CHECKLIST WAS ACCOMPLISHED. ON SECOND APPROACH ALL INDICATION NORMAL. PVG U CONSULTED WITH CREW, KNEW THAT SECOND L/G INDICATION ON LT GEAR FLASH RED WHEN THE WHITE BOX SHOWED UP, PRIMARY INDICATION WAS NORMAL ALL THE WAY.