As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - CREW REPORTED, THE LANDING GEAR AURAL WARNING SOUNDED AFTER GEAR HANDLE WAS RAISED AND ALL LANDING GEAR UNSAFE LIGHTS REMAINED ON AFTER LANDING GEAR RETRACTED AFTER TAKEOFF. LOWERED LANDING GEAR AND LANDED WITHOUT INCIDENT. REPLACED THE LEFT THROTTLE SWITCH ASSEMBLY AND ACCOMPLISHED LANDING GEAR RETRACTION/EXTENSION TEST AND OPERATED NORMALLY. (W)