What was found
DURING PREFLIGHT INSPECTION, FLIGHT ATTENDANT NOTIFIED THAT ROW 13 EMERGENCY EXIT LIGHTS DID NOT ILLUMINATE. FOUND BATTERY PACK NR 5 WILL NOT TAKE A CHARGE. REMOVED CEILING PANEL & BATTERY PACK NR 5 IAW AMM 33-51-17. NR 5 BATTERY PACK INOPERATIVE. R & R BATTERY PACK PS 38, NO FIX. R & R BATTERY PACK PS 37 IAW JC 33-900-701. OPS CHECKED GOOD. INSTALLED ORIGINAL BATTERY PACK AT PS 38. OPS CHECKED GOOD IAW AMM 33-51-17.