As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CHECK OF THE EMERGENCY POWER SUPPLY UNITS BITE CHECK FAILED FOR 10WL (ATA 33-51-38 EPSU UNIT FWD L) PER HAECO LCQ NON-ROU TINE 9296935/38935. REMOVED AND REPLACED EPSU OWR SUPPLY UNIT 10WL IAW A319/A320 AMM 33-51-38 OPS TEST GOOD IAW A319/A320 AMM 33-51-00-710-001-A. ME CH V925039 ROTABLE PARTS CHANGE WAS INDICATED - TT 1212656 SN OFF 4333 POWER SUPPLY, C OFF 31-3350-9-9001 4333 ON 31-3350-9-9001 4744.