What was found
AFTER TAKEOFF WITH GEAR RETRACTED, ECAM IND L/G NOT UPLOCKED & L/G DOOR NOT CLOSED MESSAGE. RECYCLED, RECEIVED MESSAGE, RECYCLED AGAIN & GEAR RETRACTED NORMALLY, TURNED BACK. PFR FAILURES IND NLG UPLOCK PROXIMITY SENSORS (12GA & 13GA), DOWNLOCK (18GA & 19GA), FOLLOWED BY TARGET POSITION ON ALL SENSORS. T/S MANUAL WARNINGS PLUS FAILURES LED TO 32-31-00-810-808, SELECTOR VALVE (40GA) FAULTY. R&R L/G SELECTOR VALVE (40GA). T/S FOUND L/G DOOR SELECTOR VALVE (41GA) HOT, REPLACED L/G DOOR SELECTOR VALVE (41GA). LEAK & OPS CHECK GOOD. VENDOR BENCH TEST OF L/G DOOR SELECTOR VALVE, NO FAULT FOUND. L/G SELECTOR VALVE, CONFIRMED FAILURE AS INTERNAL LEAKAGE. UNIT RESEALED.