Another document, which I cannot locate online yet, was a report, (presentationMAK.ppt), apparently written by the IAC/MAK concerning known aircraft descent trajectories of previous LOC accidents. I know that this point has been made earlier in the thread but the presentation reinforces the notion that crash sites are almost always within ~12nm of the LKP.
A small summary of the results of the Briefing including a graphic showing the distribution of distance of travel between LoC and Impact in 9 previous cases you can find in
http://fusion.isif.org/proceedings/F...papers/140.pdf on page 1063, Figure 2
It would probably wise to start from LKP in this case as well. LKP being the point where primary radar signal was lost. They should find it in a circle of much less than 5NM from there. Compared to AF447 (or even MH370) finding this one should be a walk in the park.