PurposeUSED TO APPLY AIR AND DYE TO DEFECTIVE AREA FOR FUEL LEAK TRACING. ADAPTER UTILIZES EXISTING FASTENER LOCATION NEAR SUSPECTED LEAK. ADAPTER BODY IS HELD ON OUTSIDE SKIN SURFACE WHILE BOLT IS TIGHTEND FROM INSIDEAirplane707, 727, 737, 747, 757, 767, 777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 