PurposeUSED TO VERIFY CORRECT OPERATION OF GROUND FAULT INTERRUPT CIRCUIT IN ELMS-2 (ELECTRICAL LOAD MANAGEMENT SYSTEM) FOR AC HYDRAULIC, OVERRIDE, AND JETTISON PUMPS PROTECTIONAirplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 