As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS PUSH TO TEST SWITCH IN COURIER AREA DOES NOT ILLUMINATE DURING TEST. (EMERGENCY LIGHTS DO ILLUMINATE.) RED LED ON POWER SUPPLY UNIT IS ILLUMINATED DURING TEST. REMOVED AND REPLACED EMER POWER SUPPLY BATTERY, REF A300 AMM 33-51-14-04. SYSTEM OPS CHECKS GOOD. OK FOR SERVICE.