What was found
DURING HEAVY MAINTENANCE: DURING INTERIOR LIGHTS CHECK, EMERGENCY LIGHTS FROM CEILING PANEL 227BLC, 233ALC, 243CLC, 243GLF, AND 243ELC ARE INOPERATIVE; REF TOMX WO # 1997 N/R# 00465. TROUBLESHOOTING WAS PERFORMED PER EMB-190 FIM 33-50-00-810--813-A AND EMB-190 FIM 33-50-00-810-802-A AND ELPUS WERE REPLACED PER EMB-190 AMM 33-50-01-000-801-A AND EMB-190 AMM33-50-01-400-801-A SATISFACTORY TEST. (SUPPLEMENTAL INFORMATION ADDED TO ATA CODE)