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 FOUND LANDING GEAR RELEASE VALVE RESET BUTTON POPPED. RESET LANDING GEAR RELEASE VALVE RESET BUTTON. GEAR SWING OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)