As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 743, BCN - PHL - CAPTAIN STATED THAT UPON GEAR RETRACTION THE GREEN HYDRAULIC SYSTEM LIGHT ILLUMINATED. THE GEAR WOULD NOT RETRACT, GEAR DOORS OPENED AND REMAINED OPEN. IT WAS AGREED TO RETURN TO BCN. THE FLIGHT LANDED UNEVENTFULLY. REMOVED AND REPLACED MAIN LANDING GEAR SELECTOR VALVES MANIFOLD AND PERFORMED FUNCTIONAL TEST OF NORMAL EXTENSION AND RETRACTION SYSTEM.