What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS UPON SELECTION OF LDG GEAR UP GREEN HYD LOW PRESSURE MSG ON ECAM AND GEAR WOULD NOT RETRACT. RAN ECAM PROCEDURE AND SHUT DOWN GREEN ENG #1 PUMP APPROX 2 MINUTES AFTER EVENT. MAINTENANCE FOUND PRESSURE FITTING TO THE SELECTOR VALVE MANIFOLD ASSY CRACKED. REMOVED & REPLACED THE PRESSURE FITTING IAW AMM 20-23-11. LEAK CHECKED. ACCOMPLISHED A LANDING GEAR RETRATION & EXTENTION IAW AMM 32-31-00. LEAK & OPS CHECKS GOOD.