As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. SEAT MOUNTED EMER LIGHTS ARE INOPERATIVE FROM ROW 21 AFT. R & R EMER LIGHT BATTERY PACK B5-105, BUT FOUND REPLACEMENT PACK TO BE BAD FROM STOCK. THIS SDR IS FOR ORIGINALLY DISCREPANT PACK. SEE RELATED SDR AALA20160321008 FOR BAD FROM STOCK UNIT.