A magnetrostrictive sensor (MsS) guided-wave technology was developed for generating and receiving guided wave in a plate-like structure. The MsS probe consists of a thin ferromagnetic strip (approximately 0.12mm thick) and a flat excitation circuit pattern (approximately 0.15mm thick) that are permanently bonded to the surface of a structure being monitored. One 200-mm-long MsS probe can monitor an area approximately 300mm by 3700mm (1-by-12-feet).  The probe generates a guided wave that can propagate long distances and that fills the entire cross sectional area of the material. The large area monitoring with the guided wave is a fast and cost-effective method compared to scanning over the entire area under test using point probes. As an example of its applicability for composite aircraft structure, notch defect growth in IM7-6K plain weave carbon fabric was monitored with Lamb wave.  The results obtained will be presented.