PurposeUSED TO ACCOMPLISH THE LEAK TEST ON THE FORWARD AND AFT CARGO COMPARTMENT FIRE EXTINGUISHING SYSTEM. MAXIMUM OPERATING PRESSURE IS 100 PSI.Airplane747, 767, 777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 