As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TASK CARD 78233001, FOUND EMERGENCY LIGHTS FPR LT AFT OVERWING EXIT AND PASS CABIN EMERGENCY LIGHTING FROM ROW 18ABC TO 23ABC NOT WORKING FOR FULL 15 MIN TEST. ACFT GROUNDED. REPLACED EMERGENCY EXIT LIGHTS BATTERY PACKS M1670 AND M1694 IAW AMM 33-51-06-960-805. OP-CHECKS GOOD.