What was found
DISCREPANCY: DURING EMBRAER PHENOM 300 BASE CHECKLIST FOUND EMERGENCY LIGHT SWITCH INTERMITTENT IN ON POSITION. CORRECTIVE ACTION: FOUND THE EMERGENCY LIGHT SWITCH TO BE DEFECTIVE, PERFORMED REPLACEMENT OF THE COCKPIT LIGHTING SYSTEM CONTROL PART NUMBER 441-44443-001 WITH A REPAIRED UNIT IN ACCORDANCE WITH EMBRAER PHENOM 300 AMM 33-01-01 AND PERFORMED OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM WITH NO DEFECTS NOTED IN ACCORDANCE WITH EMBRAER PHENOM 300 AMM 33-52-00.