What was found
NONE OF THE EMERGENCY LIGHTS ILLUMINATE WHEN SWITCH IS ON WITH MAIN BATTERIES OFF. LIGHTS OPS NORMAL ALL OTHER CONDITIONS. REMOVED THE FAULTY NR 1 BATTERY & INSTALLED SERVICEABLE BATTERY IAW MM 33-50-07. REMOVED FAULTY #2 BATTERYT & INSTALLED SERVICEABLE BATTERY IAW MM 33-50-07. REMOVED FAULTY #3 BATTERY & INSTALLED SERVICEABLE BATTERY IAW MM 33-50-05. REMOVED FAULTY #4 BATTERY & INSTALLED SERVICEABLE BATTERY IAW MM 33-50-05. OPS CHKD IAW MM 33-50-00, NO DEFECTS. ALLOWED BATTERIES TO CHARGE FOR AN ADDITIONAL 60 MINS. OPS CHKD LIGHTS IAW MM 33-50-00, NO DEFECTS. REMOVED POWER FROM ACFT. MOVED EMERGENCY LIGHTS SWITCH TO ON & FOUND ALL EMERGENCY LIGHTS ILLUMINATED. MOVED SWITCH TO ARM & LIGHTS REMAINED ILLUMINATED. APPLIED POWER & FOUND THE EMERGENCY LIGHTS EXTINGUISHED.