As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: OCCURED DURING A RON MAINTENANCE VISIT, NO FLIGHT DELAY. REFERENCE LP704938 ITEM 3, PERFORMED EPSU TEST AND FOUND 12WL BATTERY FAILED. REMOVED AND REPLACED THE BATTERY ON 12WL PER AMM REF. 33-51-38-400-002-A. PERFORMED EPSU TEST AGAIN. TEST PASSED. /END/