roam:/System/Library/Extensions root# kextload -t AppleAirPort.kext 
kernel extension AppleAirPort.kext has problems:
Validation failures
{
    "Executable file doesn't contain kernel extension code" = true
}

roam:/System/Library/Extensions root# kextload -t AppleAirPort2.kext
kernel extension AppleAirPort2.kext has problems:
Validation failures
{
    "Executable file doesn't contain kernel extension code" = true
}

roam:/System/Library/Extensions root#