As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - DURING SERVICE CHECK, OVERWING EMERGENCY SPOTLIGHTS CAME ON WHEN SWITCHING FROM EXTERNAL POWER TO APU POWER. EMERGENCY LIGHTS SWITCH IN COCKPIT WAS IN OFF POSITION. REMOVED AND REPLACED BATTERY PACK ASSEMBLY. LIGHTS THEN OPERATED NORMALLY. (M)