As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT WING SLIDE EICAS MESSAGE CAME ON INTERMITTENTLY ON TAXI OUT. *S/D* ACCOMPLISHED LT OFF-WING ESCAPE SYSTEM CHECK OF ADJUSTMENT OF SLIDE COMPARTMENT DOOR PROXIMITY SENSOR. THE SENSOR WAS FOUND WITHIN LIMITS. ACCOMPLISHED CHECK OF DOOR ADJUSTMENT AND DOOR LOCK SENSOR S198. ALL WAS FOUND WITHIN LIMITS. ACCOMPLISHED BITE OF PROXIMITY SENSOR BOX. NO DEFECTS NOTED. CAUSE UNKNOWN. RETURNED AIRCRAFT BACK TO NORMAL. AIRCRAFT TAXIED WITH NO MESSAGES.