What was found
EMER LIGHTS BY THE EMERGENCY EXIT AND EXTERIOR ARE INOP. EMER LIGHTS BY THE MAIN CABIN DOOR ARE STILL WORKING PROPERLY. ARRIVED AT AIRCRAFT, PERFORMED OPS CHECK OF EXTERIOR AND INTERIOR EMER LIGHTS. OPS CHECK GOOD. STARTED APU AND CHARGE THE EMERGENCY BATTERY, PERFORMED OPS CHECK OF THE EMERGENCY LIGHTS WITH NO ISSUE NOTED. CHARGED BATTERY FOR MORE THAN AN HOUR. PERFORMED ANOTHER OPERATIONAL TEST. ALL LIGHTS WORK AS INTENDED. UNABLE TO DUPLICATE FAULT. CONTACTED MCC, NOTIFIED THEM OF FINDINGS. DUE TO NO HISTORY, MCC AGREED TO SIGN OFF AT THIS TIME. ALL WORK PERFORMED IN REF TO CE-680 AMM 33-50-10. NO OTHER DEFECTS NOTED