As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4154 CREW REPORTED ON TAKEOFF LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED LGEU, ADJUSTED GAP ON LEFT NR 2 AND RIGHT NR 1 WOW PROX SWITCHES OPERATIONAL CHECKED GOOD. AIRCRAFT RETURN TO SERVICE.