As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GNDED. WHILE ACCOMPLISHING A SCHEDULED SLIDE CHANGE ON THE L2 DOOR, THE REPLACEMENT SLIDE FAILED THE EMER LIGHT TEST VIA THE CIDS PANEL. DETERMINED THE INTERNAL BATTERY PACK WAS BAD & RETURNED THE DEFECTIVE SLIDE BACK TO THE STOCK ROOM & INSTALLED A SERVICEABLE SLIDE IN ITS PLACE.