What was found
AIRCRAFT NOT GROUNDED) REF: NRI 2-10 - UPPER FUSELAGE AFT ENTRY AREA EPSU (13WL) BATTERY FAILED. REPLACED UPPER FUSELAGE AFT ENTRY AREA EPSU BATTERY (131WL), IAW AMM TASK 33-51-38-000-002-A AND 33-51-38-400-002-A, REV 44, DATED: 05/01/2024. A1P182 2-10.