What was found
EMERGENCY LIGHTING AT REAR OF AIRCRAFT DOES NOT APPEAR TO BE WORKING. TWO OVERHEAD EMERGENCY LIGHTS ALSO APPEAR TO BE INOPERATIVE. CHECKED FOR SHORTS AND OPENS TO NR 4 BATTERY PACK, NR 4 INVERTER, ALL AFT UPPER AND LOWER EMERGENCY LIGHTS IAW WM 33-51-00 AND 33-52-00. DURING CHECKS FOUND WIRE C1 ON TB 107 TO BE LOOSE. RESECURED PIN IAW ESPM 20-20-00. LIGHTS OPS CHECKED GOOD AT THIS TIME.