PurposeUSED TO MONITOR AND TROUBLESHOOT AIRPLANE WIRING AND CARD FILE BACKPLANE INTEGRITY BY PROVIDING PIN ACCESS TO CONNECTORS. THE EXTENDER CARD CONTAINS PIN JACKS FOR USE WITH ANY PROBE BUT PREFERABLY WITH A PIN PROBE </= .040"Airplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 