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Engineering Toyosatodail − 1， Uts omiya ， Tochigi， 320 − 8551Japan CF 齟 com 四 sites us 的 about 50 ％ fOr the bOdy ofBoe 血 g 787 jet plane ． Many k血d ofd 遡 e ， br e ple bhd 蚣 e or lightning hit ， may be intmduced in the airplane du血1g the long t e use． The effect ofsimulatod lightning hit damage on the flexural Strength of CFRP with aluminum mesh sheet ， were 血vestigaiOd ． The flexura1 strength of CFRP Without metal mesh sheet decrease strongly ， depending on the through −thickness type lightning hit damage ． On the other hand ， that ofCFRP wnh aluminum mesh sheet decrease slightly under thivugh − thickness type lightn 血 g hit damage ， and that ofthe CFRP whh aluminum mesh shoet Clo not decrease under surface type lightning hit damage ． The effect ofcure temperature on the strength ofCFRP with and w 瓧 hout metal mesh sheet ， were slightly reoogn レed ． The 且exural strength of CFRP w 虻 h alumlnum mesh sheet against lightning hit damage was almost similar tr )the resuh ofCFRP wh 』 Qopper mesh sheet．