Q: Can someone help me diagnose this problem with ibook g4?

I have an ibook g4, and I purchased it a couple of months ago.  I'm currently running Mac OS X Tiger.  I've upgraded the machine to it's maximum ram and hard drive.  It's worked well for a couple of months.  But, within the last month I've been getting kernel panics.  During, that time I went into Disk Utility and it found a HFS format problem. I fixed that with original install discs and I also ran the Apple Hardware Test.  After, that everything seemed fine. But, I'm still getting kernel panics. (6 or 7 times booting up with kp's and then it goes into Mac OS X.)  I've also checked Disk Utility again.  It says the HFS volume is ok.  I don't know what the issue is ...  It's either the hard drive or airport card? Can someone help diagnose the issue with my ibook g4? I've also included the panic's code from the Console application. 

Evan

Here it is:

Mon Aug 11 11:49:03 2014

panic(cpu 0 caller 0x000A8C00): Uncorrectable machine check: pc = 000000000071052C, msr = 0000000000149030, dsisr = 42000000, dar = 00000000E00EF000

  AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000

     L2FIR = 0000000000000000,  BusFir = 0000000000000000

Latest stack backtrace for cpu 0:

      Backtrace:

         0x000954F8 0x00095A10 0x00026898 0x000A8C00 0x000A7E90 0x000ABB80

Proceeding back via exception chain:

   Exception state (sv=0x44F51780)

      PC=0x0071052C; MSR=0x00149030; DAR=0xE00EF000; DSISR=0x42000000; LR=0x00725078; R1=0x21F43D30; XCP=0x00000008 (0x200 - Machine check)

      Backtrace:

0x02771A40 0x00725078 0x002D1B8C 0x002D0A54 0x000A9714

      Kernel loadable modules in backtrace (with dependencies):

         com.apple.iokit.AppleAirPort2(405.1)@0x6e6000

            dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x613000

            dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000

   Exception state (sv=0x320EB000)

      PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

Kernel version:

Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC

*********

Thu Sep 18 10:22:01 2014

panic(cpu 0 caller 0x000A8C00): Uncorrectable machine check: pc = 00000000006EC6AC, msr = 0000000000149030, dsisr = 40000000, dar = 00000000A37E902C

  AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000

     L2FIR = 0000000000000000,  BusFir = 0000000000000000

Latest stack backtrace for cpu 0:

      Backtrace:

         0x000954F8 0x00095A10 0x00026898 0x000A8C00 0x000A7E90 0x000ABB80

Proceeding back via exception chain:

   Exception state (sv=0x3D004A00)

      PC=0x006EC6AC; MSR=0x00149030; DAR=0xA37E902C; DSISR=0x40000000; LR=0x006EFA9C; R1=0x21F13180; XCP=0x00000008 (0x200 - Machine check)

      Backtrace:

0x006EFA90 0x006F0A08 0x006F190C 0x006ECA1C 0x007024F8 0x006FD930

         0x007292EC 0x00705B18 0x00725874 0x00722F9C 0x007358F8 0x0061F42C 0x0061F2AC 0x002D2244

         0x0061F320 0x00616240 0x00616470 0x006160FC 0x0061F2AC 0x002D2244 0x0061F320 0x00615FBC

         0x0011E790 0x0011BB98 0x0011C0A8 0x00283F80 0x00284034 0x00260FE4 0x00280198 0x002ABDB8

         0x000ABD30 0x70706C65

      backtrace continues...

      Kernel loadable modules in backtrace (with dependencies):

         com.apple.iokit.AppleAirPort2(405.1)@0x6e6000

            dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x613000

            dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000

         com.apple.iokit.IONetworkingFamily(1.5.0)@0x613000

   Exception state (sv=0x37E21500)

      PC=0x90001F0C; MSR=0x0200F030; DAR=0xE00EC000; DSISR=0x42000000; LR=0x000E431C; R1=0xF00803E0; XCP=0x00000030 (0xC00 - System call)

Kernel version:

Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC

*********

Specs:

ibook g4 (Mid 2005)

1.42 ghz

1.5 GB of Ram

250 GB Hard drive