As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND OVERHEAD ROW 29 & 34 EMERGENCY EXIT LIGHTS INOP. VERIFIED LIGHTS BRIEFLY COME ON AND THEN TURN OFF. TRIED KNOWN GOOD BATTERY PACK, FOUND LIGHTS OPERATE NORMALLY. UNABLE TO REPLACE BATTERY PACK DUE TO PART NIS. REF AMM 33-51-06-960-805. REPLACED EMERGENCY BATTERY PACK IN CEILING OVER SEATS 31-32 DEF. OPS CHECKED NORMAL. QC ACCOMPLISHED EEL OPERATIONAL TEST INSPECTION IAW 33-51-06