As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EPSU BATTERY (10WL) FAILED ON EMERGENCY LIGHTING BATTERY CAPACITY TEST. AS NOTED ON LTPR NR TASK CARD# 5001184853-0010. EPSU BATTERY (10WL) FAILED ON EMERGENCY LIGHTING BATTERY. CAPACITY TEST AND REQUIRE REPLACEMENT. BATTERY REPLACED (10WL). PERFORMED IAW AMM:33-51-38-000-002/33-51-38-400-002 REV. 117. TEST SATISFACTORY.