As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NR 5232 (OXR/LAX) PILOT REPORTED, THE LANDING GEAR FAILED TO RETRACT AFTER TAKEOFF. MAINTENANCE FOUND THE EMERGENCY RELEASE VALVE BYPASS PIN POPPED. MAINTENANCE REMOVED AND REPLACED HYDRAULIC RELEASE VALVE. OPERATIONAL CHECKS WERE GOOD, NO LEAKS WERE NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.