What was found
DURING CABIN EMERGENCY LIGHTING TEST AFT LEFT BATTERY (13WL) FAILED / REMOVED AND REPLACED AFT LEFT BATTERY 13WL IAW AMM 33-51-38"
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CABIN EMERGENCY LIGHTING TEST AFT LEFT BATTERY (13WL) FAILED / REMOVED AND REPLACED AFT LEFT BATTERY 13WL IAW AMM 33-51-38"