As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - EMERGENCY EXIT LIGHTS ON LEFT AND RIGHT SIDE UPPER SIDEWALL AT ROW 20 FORWARD OVERWING INOPERATIVE. REPLACED BATTERY PACK FOR FORWARD OVERWING EMERGENCY EXIT LIGHTS AT ROW 20 LEFT AND RIGHT UPPER SIDEWALL. SYSTEM GROUND CHECKED NORMAL OPERATION.