As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING EMERGENCY POWER SUPPLY CHECK IAW ALLEGIANT TASK 05-000-002 LH EPSU 10WL FAILED. THE EMERGENCY POWER SUPPLY UNIT 10WL WAS REPLACED IAW A320 AMM 33-51-38-000-001-A AND 33-51-38-400-001-A REV 43 DATE 02-01-2024, THE NEW PART PASS THE TEST. EPSU P/N OFF 3214-62-10 S/N OFF 143215 P/N ON 3214-62-10 S/N ON 008913.