Question: how to deplot this case?

ode1a := diff(y1(tt), tt) = 1.342398800*10^5*y1(tt)+89591.20000*y2(tt)+44647.44000*y3(tt);
ode2a := diff(y2(tt), tt) = 89591.20000*y1(tt)+89803.24000*y2(tt)+44901.60000*y3(tt);
ode3a := diff(y3(tt), tt) = 44647.44000*y1(tt)+44901.60000*y2(tt)+44859.24000*y3(tt);
 
DEplot3d({ode1a,ode2a,ode3a}, {y1(tt), y2(tt), y3(tt)}, tt=0..10,[[y1(0) = 0, y2(0) = 0, y3(0) = 0]],scene=[tt,y1(tt),y2(tt)]);
DEplot3d({ode1a,ode2a,ode3a}, {y1(tt), y2(tt), y3(tt)}, tt=0..10,[[y1(0) = 0, y2(0) = 0, y3(0) = 0]],scene=[tt,y1(tt),y3(tt)]);
DEplot3d({ode1a,ode2a,ode3a}, {y1(tt), y2(tt), y3(tt)}, tt=0..10,[[y1(0) = 0, y2(0) = 0, y3(0) = 0]],scene=[tt,y2(tt),y3(tt)]);
 
can it plot 3 functions ?
and why it return a straight line 3d graph
 
is there some interesting graph from this system?
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