What was found
AFTER TAKEOFF AND 30 MINUTES INTO FLIGHT IN THE MID FL250, IAS WAS 310 KIAS, A NOSE GEAR INDICATION SHOWED TWO RED TRIANGLE NOT UP AND LOCKED. DESCENDED ALTITUDE THAT ALLOWED SLOWING TO LESS THAN VLE. ACCOMPLISHED ECAM PROCEDURE. EXTENDED GEAR ON DOWNWIND, WITH GOOD, SAFE, DOWN & LOCKED INDICATION. UNEVENTFUL LANDING. ACCOMPLISHED TSM 32-31-00-810-827-A, WITH NO FAULTS, REMOVED AND REPLACED NLG UPLOCK 2530GM IAW AMM 32-31-21 LEAK & OPS CHECKED OK. AIRCRAFT WAS GROUNDED.