What was found
FLIGHT 773, PHL-LAS: ON APPROACH, RECEIVED LEADING EDGE DISAGREE MESSAGE. EXECUTED GO-AROUND. WHEN CREW BEGAN TO SELECT ALTERNATE FLAP SWITCH, FLAP NEEDLES MATCHED AGAIN AND SYSTEM OPERATED NORMALLY. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE NR 12 GRA OVERLOAD INDICATOR TRIPPED. ACCOMPLISHED RESET, AND NO FURTHER FAULTS NOTED.