What was found
AIRCRAFT WAS NOT GROUNDED: DURING LEFT AFT SLIDE CHANGE, EPSU SYS TEST FAILED. FAULT: BAT/EPSU(13WL) AFT L. MAINTENANCE REPLACED BATTERY OF EPSU IAW AMM 33-51-38.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: DURING LEFT AFT SLIDE CHANGE, EPSU SYS TEST FAILED. FAULT: BAT/EPSU(13WL) AFT L. MAINTENANCE REPLACED BATTERY OF EPSU IAW AMM 33-51-38.