As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A CHECK OF THE EMERGENCY LIGHT BATTERY PACKS AS A PART OF AN OVERNIGHT WORK PACKAGE 15 EMERGENCY LIGHT BATTERY PACKS FAILED THE CHECK OUT. MAINTENANCE FERRIED THE AIRCRAFT TO MSP WHERE THE BATTERY PACKS WERE EITHER REPLACED OR RESTORED TO SERVICEABLE CONDITION.