PurposeUSED TO FACILITATE THE OPERATION OF THE ELECTRICAL/ELECTRONIC COOLING FANS (VENT AND SUPPLY FANS) DURING A NORMALLY DISABLED TEST, SUCH AS THE FORWARD CARGO DOOR FIRE EXTINGUISHING TEST (ELECTRICAL)Airplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 