As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED UNCOMMANDED EVAC HORN ACTIVATION WITH P/B LIGHT DURING TAXI IN. TROUBLESHOT EVAC HORN UNDER TSM 23-73-00-810-955-A. PERFORMED CIDS RESET AND CIDS BITE TEST, PER AMM 23-73-00-740-005. CIDS 1 & 2 SHOW NO FAILURE MESSAGES. EVAC HORN FUNCTIONS NORMALLY AT THIS TIME. AIRCRAFT OK TO CONTINUE SERVICE.