As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAILED SYSTEM TEST OF EMERGENCY LIGHTS SHOWING EPSU LEFT AND RIGHT FAULTS REPLACE FAULTED EPSU PER TSM 33-51-00-810-801-A PERFORMED ON UNIT BUTE TEST AND VERIFIED BATTERY FAULTS. REMOVED AND REPLACED BATTERIES IAW AMM TASK 33-51-38-400-002-A. PERFORMED EMERGENCY LIGHTS SYSTEM TEST. TEST PASSED, FAULT CLEARED.