What was found
ALL EMERGENCY LIGHTS FLASHING REGARDLESS OF SWITCH POSITION COULD NOT DUPLICATE FLASJIING ON EMERGENCY LIGHTS BUT FOUND TILAT EMERGENCY LIGHTS SWITCH POSITION REMAINED LLLUMINATED IN ARM POSITION WHILE IN USE WITH MAIN BATTERIES.DISCONNECTED AFT BA'ITERY PACK AND NOW LIGHTS DO NOT ILLUMINATE 1N ARM POSITION \VHJLE BEING "PJGGY BACKED" OFF MAIN BA 'ITERIES. THIS CONFRRMED AFT BA 'ITERY PACK IS TIIE ISSUE. R&R. AFT L!MERGL!NCY BATTERY PACK W/ TESTED UNIT IA W EMB 505 AMM 33-52-00 OPS CHECK GOOD NOW LIGHTS ONLY ILLUMINATE WITH RESPECTIVE POSITION OF SWLTCH.