As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AIRCRAFT WAS NOT GROUNDED: REF MIC 1921117. PERFORMED OPERATIONAL CHECK OF EMERGENCY POWERSUPPLY UNITS BY BITE-CHECK IAW AMM 33-51-00. FAILURE MESSAGES EPSU INT LOAD FWD L, AND EPSU INT LOAD AFT L FOUND. REMOVED AND REPLACED EXIT LOCATER SIGNS AT 52WL IAW AMM 33-51-17. OPS CHECKS GOOD.