What was found
LOWERED THE LANDING GEAR ON FINAL AND RECEIVED A DUAL SYSTEM NLG RED "UNLOCK" . MISSED APPROACH AND COMPLIED WITH ECAM ( AFTER REVEIWING QRH) TO GRAVITY EXTEND PROCEDURE. AFTER SAME RED "UNLOCK" OCCURRED. COMMUNICATION WITH MX AND REVERSED GRAVITY EXT. CRANK TO ALLOW SYSTEM 1 AND 2 NORMAL RETRACT AND THEN EXTEND CYCLE TO ATTEMPT NORMAL INDICATION OF DOWN AND LOCKED. 2 CYCLES, STILL RED "UNLOCK" BOTH TIMES VISUAL E/E COMPARTMENT INSPECT WERE UNLOCKED. INDICATION RETURNED TO NORMAL DOWN FINISHED REMOVAL OF RETRACT ACTUATOR AND INSTALLED NEW ACTUATOR IAW AMM 32-31-22-04. REMOVED AND REPLACED NLG TELESCOPIC STRUT ASSY PER MOCC. CYCLED NLG 10 TIMES. FUNCTION AND LEAK CHECKED GOOD ON BOTH WITH HYDRAULICS.