As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTING SYSTEM OPERATIONAL CHECK {B737-33-3-0235} - OVERWING CEILING EXIT SIGN, BOTH R/H OVERWING ESCAPE HATCH UPPER EXIT SIGNS AND BOTH L/H & R/H OVERWING ESCAPE HATCH LOWER EXIT SIGNS ARE INOP. REPLACED BATTERY PACK UNDER DATO PANEL AT ROW 20 RH SIDE IN REFERENCE TO AMM 33-51-06. ALL EMERGENCY LIGHTS OPS CHECKS GOOD. PARTS USED: 99-3351-3-0015,QTY :1