Interestingly, Triacetonetriperoxide (TATP) is the most common terrorist explosive used in Israel, largely because of its ease of manufacture. However, in order to be effective, it requires to be detonated in an enclosure (such as a pipe-bomb) and in the format used would not have been very effective. Indeed, even without being detonated, it is likely to have caused significant damage to the wearer's shoes! However, it is highly sensitive to jarring and putting it in one's shoes is akin to playing Russian Roulette with an automatic pistol.
It's actually used as a 'primary' explosive; ie one that detonates another, more powerful charge such as C4.
It is therefore improbable that much damage to the aircraft could have been caused in this case.