So what precisely do you find sinister about US P-3's assisting in the search? If we have we have P-3s in the region, it seems an natural and obvious thing to have offered their assistance. You're aware that the purpose of a P-3 is locating things in the water, right? and as such, would have relevant capabilities to offer? I'm at a loss for how you possibly interpret this as indicating a conspiracy.
Not sinister.
Get a map out.
MH370 disappeared on the right hand side of the Malay peninsular.
The USA P3 Orions are searching on the left hand side.
This implies that the searchers know the plane did not break up immediately the transponder stopped working, but that it continued flying.