As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON TAXI IN AND SHUTTING DOWN AN ENGINE THE AIRCRAFT DID SINGLE CHIME AND EXIT LIGHTS CAME ON - THIS ALSO HAPPENED AGAIN WHEN TRANSFERRING TO GROUND POWER AT GATE - MAINTENANCE REPLACED POSITION 2 CIDS DIRECTOR PER AMM 23-73-34