What was found
MDIS - EPSU "UNIT FAULT" LIGHT DISPLAYED ON UNIT AT MID LEFT CABIN LOCATION. MAINTENANCE REPLACED EPSU AND BATTERY, EMERGENCY LIGHT SYSTEM TEST IS SATISFACTORY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MDIS - EPSU "UNIT FAULT" LIGHT DISPLAYED ON UNIT AT MID LEFT CABIN LOCATION. MAINTENANCE REPLACED EPSU AND BATTERY, EMERGENCY LIGHT SYSTEM TEST IS SATISFACTORY.