What was found
DISCREPANCY: IN ZONE 121 UPON FUNCTIONAL CHECK OF R/H RACK EMERGENCY LIGHTS BATTERY (EMBRAER PHENOM 300 SMR TASK 33-52-01-001), BATTERY FAILED AT 18:11 SECONDS AT 20VDC. PASSING TIME IS 22 MIN AT 20VDC. CORRECTIVE ACTION: PERFORMED REPLACEMENT #2(RH RACK) EMERGENCY LIGHT BATTERY WITH A MODIFIED BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-01. PERFORMED OPERATIONAL TEST OF EMERGENCY LIGHTS BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-00. NO DEFECTS NOTED. THIS REPORT COMPLIES WITH FAA 14 CFR PART 135 OPERATOR'S GMM REQUIREMENTS.