What was found
DURING POWER SHIFT, AFTER STARTING NR 3 ENG, FROM APU POWER TO GEN 3 POWER, EMER LIGHTS DISARM ALERT CAME ON. RESETTING EMER POWER TO EITHER OFF OR ON HAS NO AFFECT. THE ALERT STAYS ON.. MX RESET THE CB, NO AFFECT. T/S PER FIM 33-51-01-00, DEU SELECTION CHECK OK. PERFORMED EMERGENCY LIGHT SYSTEM FUNCTIONAL TEST SATISFACTORY PER AMM 33-50-00-5. RAN ALL 3 ENG WITH EMERGENCY LIGHT SWITCH ARMED, NO ALERT SHOWN. MEL CLEARED.