Hate to admit to “speculation”, but this is an interesting case to me.
We have actually not had any real “reports” yet, other than journalists’ rendering of what they have heard/read in other media, and alas most likely misinterpreted.
Passengers tell that on cruise a/c became dark and stuffy (electrical failure?), and the captain obviously chose to descend/divert. After that, we have no reliable info.
Somewhere is stated that a/c landed on grass beside rwy, so it may not actually have been an overrun. Maybe hard to determine exact location from pictures, so I leave that to those who actually have been there.
Wheels may not have been locked down, but definitely out of bay as they were damaged on touchdown, as shown here in pic 27:
http://fotogaleri.hurriyet.com.tr/ga...763&p=27&rid=2
I do know that the captain happens to be very experienced on the MD-80, and thus believe he used all options available. After all, a/c was intact and all survived!