As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - ON FLIGHT 2383, CAPTAIN'S ARCDU FAILED SHORTLY AFTER TAKEOFF AND REVERTED TO EMERGENCY MODE OF OPERATION. FAILURE SEEMED TO COINCIDE WITH FIRST OFFICERS ATTEMPT TO TRANSMIT TO ATC. CYCLED POWER ON CAPTAINS ARCDU RESTORED NORMAL OPERATION. PROBLEM REOCCURRED TWICE ON APPROACH. REPLACED NR 1 ARCDU. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.