What was found
DURING FINAL, SELECTED GEAR DOWN AND HAD AMBER DOOR LIGHTS AND RED GEAR LIGHT FOR LONGER THAN USUAL FOLLOWED BY ECAM GEAR NOT DOWN AND LOCKED. EXECUTED GO AROUND, RAISED GEAR SUCCESSFULLY. SWITCHED POSITION DETECTOR TO SYSTEM 2 AND LOWERED GEAR HANDLE WITH AMBER DOOR LIGHTS AND RED GEAR LIGHT LONGER THAN USUAL AGAIN WITH ECAM GEAR NOT DOWN ALERT, BUT A MOMENT LATER RECEIVED A GREEN GEAR DOWN INDICATION ON INST PANEL AND OVERHEAD. INSTALLED SERVICEABLE LANDING GEAR SELECTOR VALVE, 3GA, AMM 32-31-12-04. PERFORMED A LANDING GEAR ELECTRO VALVE CHECK REF AMM 32-31-12-06, LEAK CHECK GOOD AND GEAR EXTENSION, RETRACTION ON BOTH SYS NR 1 AND NR 2 REF AMM 32-31-00--05-09, ALL TEST GOOD.