As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WHEN LANDING GEAR WAS SELECTED UP ECAM MESSAGE "LANDING GEAR NOT UPLOCKED AND HYDRAULIC GREEN ENGINE 1 AND 2 PUMPS LOW PRESSURE GREEN HYDRAULIC SYSTEM. APPEARED TO RETURN TO NORMAL UPON LANDING EMERGENCY WAS DELCLARED AND LANDING WAS UNEVENTFUL APPEARED TO RETURN TO NORMAL UPON LANDING. MAINTENANCE REMOVED AND REPLACED THE GREEN HYDRAULIC ACCUMULATOR.