In MACRs place of crash is in most cases inaccurate. And in some cases in MACRs are stated last time when plane is spotted, and after that plane could fly quite a lot.
KE reports are much more accurate, but in this case are not useful since plane crashed in Bulgaria.
If date of crash in May 18th, than it is 42-64347 as already stated by Sean.
Regarding PoW in Bulgaria, here are some useful information:
http://shumen-camp.info/index.html