What was found
DURING HEAVY MAINTENANCE: LEFT LANDING GEAR DID NOT RETRACTED AFTER TAKE OFF; APPROX 15 GEAR SWINGS WITH NO FAULTS, IAW AMM 32-31-00-720-002A & 32-31-73-000-001A & 32-31-73-200-400A & 32-69-00-740-001A. NO DEFECTS NOTED ON ECAM, OPS CHECK GOOD.