What was found
LAX - EMERGENCY POWER SUPPLY UNIT, FIN 12WL, FAILED THE BITE CHECK. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT, FIN 13WL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LAX - EMERGENCY POWER SUPPLY UNIT, FIN 12WL, FAILED THE BITE CHECK. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT, FIN 13WL.