As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH SHIP BATTERIES CONNECTED, CONDUCTING THE EMER LIGHT TEST IN THE ON. ARM POSITION NO EMERGENCY LIGHTS ILLUMINATED. REMOVED NR 1 EMERGENCY BATTERY PACK AND INSTALLED NEW NR 1 BATTERY PACK. REMOVED NR 2 BATTERY PACK AND INSTALLED A NEW NR 2 BATTERY PACK. REMOVED NR 3 BATTERY PACK AND INSTALLED A NEW NR 3 BATTERY PACK. REMOVED NR 4 BATTERY PACK AND INSTALLED A NEW NR 4 BATTERY PACK IAW AMM 33-50-10. OPS CHECKED NORMAL.