As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER A SCHEDULED REPLACEMENT OF THE AFT LEFT DOOR ESCAPE SLIDE THE EMERGENCY POWER SUPPLY UNIT SYSTEM FAILED THE BITE TEST. MAINTENANCE REMOVED THE REPLACEMENT SLIDE ON THE AFT LEFT DOOR AND INSTALLED ANOTHER SERVICEABLE UNIT PER TASK CARD 26L00025011. (AALA202502278810) MAINTENANCE ALSO REPLACED THE AFT RIGHT DOOR SLIDE PER TASK CARD 26L00025011. (AALA202502278688) A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY POWER SUPPLY SYSTEM WAS ACCOMPLISHED WITH NO FAULTS NOTED.