As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) PER WO 506881, NR-00001 - EPSU OPS CHECK OF EMERGENCY POWER SUPPLY UNITS BY BITE CHECK (EPSU BATT INSTALL OPS CHECK.) FAIL. / PER TSM 23-73-00-810-827-A, REMOVED & REPLACED DEU-B 300RH5 REF A320 AMM 23-73-47-000-001 & 23-73-47-400-001. OPS CHECK GOOD AT THIS TIME. THIS CLEARS MEL 23-73-07-B, DMI 203012. PLACARDS INSTALLED. THIS CLEARS MEL 23-73-07-B, DMI 203012. PLACARDS REMOVED MX CONTROL NOTIFIED. REF LP 1940116"