As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. DURING EMERGENCY LIGHT TEST L1 AND L2 BATTERY FAILED TEST. REPLACED L1 AND L2 DOOR LIGHT BATTERY PACKS AS PER AMM 33-51-38. OPERATIONS CHECKS NORMAL. THIS SDR IS FOR L2 BATTERY PACK. (SEE CONTROL AALA20180719009)