Only if that controlled flight was 90 degrees to horizontal.
Much has been made of parts found a distance from the crater.
All aircraft have air speed and G force limits beyond which things break off the air frame... Ailerons, horizontal and vertical stabilizer....all will flutter and separate at some point. One analysis calculated the aircraft speed at one point in the dive was more than 700 MPH.
So whether parts separated from an on board explosive or whether they separated from speed caused by loss of control will not be known for some time, unless the black boxes are operative and spell it out.
ailerons