What was found
DURING MAINTENANCE FOUND FWD EMERGENCY LIGHTS INOP. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED NR 1 BATTERY POWER SUPPLY AND NR 1 EMERGENCY BATTERY IAW EMB140 AMM 33-50-04, OPS GOOD. NO DEFECTS NOTED. BATTERY EMERGENCY LIGHT P/N OFF 2013-1A, S/N OFF 70401, P/N ON 2013-1A,S/N ON 72448 BATTERY CHANGER P/N OFF 11-0049, S/N OFF 13378, P/N ON BA50933901, S/N ON C01542. AIRCRAFT RETURNED TO SERVICE.