As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 8663 FROM ANC: AIR TURNBACK: LT GEAR WOULD NOT RETRACT ON TAKEOFF WITH GEAR HANDLE UP ALL 6 GEAR INDICATOR SHOWED GREEN DOWN ARROWS & UNLOCK LIGHTS. EMERGENCY DECLARED. AIRCRAFT LANDED WITHOUT INCIDENT. REMOVED AND REPLACED 3 PROXIMITY SWITCHS, REMOVED GROUND LUG, CLEANED AND RE-ATTCHED GROUND LUG. LANDING GEAR SYSTEM EXTENSION AND RETRACTION OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.