What was found
DURING ENGINE START THE EMER LT NOT ARM CAS REMAINED ILLUMINATED. AFTER START THE CAS EXTINGUISHED, HOWEVER THE CABIN EMER LIGHTS REMAINED ILLUMINATED UNTIL THE SWITCH WAS PLACED TO THE OFF POSITION. ATTEMPTED THE GROUND RESET PROCEDURE WITH NO RESULTS. AC WAS ON GPU POWER AND SHIP POWER CHARGING FOR OVER AN HOUR IN TOTAL. CORRECTIVE ACTION: VERFIED FAULT THEN GAINED ACCESS TO FWD AND AFT. EMER. BATTERIES R & R BOTH FWD & AFT. EMER. BATTERIES WITH REPAIRED UNITS ALL OPS CHECKS GOOD RESTORED ACCESS ITEMS IAW AMM 33-52-01.