What was found
DISCREPANCY: EMERGENCY BATTERY # 2 WON'T TURN ON EMERGENCY LIGHTS. CORRECTIVE ACTION: PERFORMED TROUBLESHOOTING BASED ON THE EMBRAER PHENOM 300 SDS CHAPTER 33-52-00 AND FOUND # 2 EMERGENCY BATTERY LIGHT (AFT)FAULTY. PERFORMED REPLACEMENT # 2(AFT)EMERGENCY LIGHT BATTERY PART NUMBER 6450LS-00 SERIAL NUMBER 002469 WITH A NEW BATTERY PART NUMBER 7450LS-00 SERIAL NUMBER 006056 IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-01. PERFORMED OPERATIONAL TEST OF EMERGENCY LIGHT BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-01 WITH NO DEFECTS NOTED. THIS REPORT COMPLIES WITH FAA 14 CFR PART 135 OPERATOR'S GMM REQUIREMENTS.