As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING EPSU BITE REF AMM 33-51-00-710-001-A, RECIEVED A EPSU EMER R BATTERY MESSAGE REMOVED AND REPLACED THE RIGHT EMERGENCY EXIT EPSU BATTERY REF AMM 33-51-38/401. OPS CHECK GOOD, ALL INSTALL TESTS PASS WITH NO FAULT MESSAGES PRESENT.