As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE THRUST REVERSERS HORN WOULD SOUND WITH ANY MOVEMENT OF THE NR 2 THROTTLE CONTROL ASSY. (NO DEPLOY LIGHTS WOULD ILLUMINATE AT THAT TIME.) FOUND SWITCH NR S-18 FAILING IN THE CLOSED POSITION WHEN MOVED. THIS IS THE DEPLOY POSITION OF THIS SWITCH.