As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - LANDING GEAR FAILED TO RETRACT AFTER TAKEOFF. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE RESET LANDING GEAR RELEASE VALVE ASSEMBLY BYPASS PIN. LANDING GEAR RETRACTION SYSTEM OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)