broken tenons by accident - suggestion needed

while i was assembled my lehart flute , my upper middle piece felt on wooden floor and i noticed on upper tenon two tiny cracks and one on lower tenon.all cracks are maybe 10-12 mm long, but wood is still closed.
cracks are visiable under light and under nail.
my question:
am i able to use super glue (cynoacrilat) to fill cracks? will be that temporaly or finnal solution of my problem ? am i able to do by myself or is better solution to send it it to mr. lehart?
i have spare upper midle piece ,but in that case i need to ask mr.lehart to put two keys from broken piece to new one.
i am just now in process of swaping my delrin seery for pvc m/e flute, so in that case i will be without d flute for couple weeks.
any suggestions?
thanks in advance, marin

i am very sorry to hear this, marin!
(in fact i’m guilty of you could be fluteless..)
my suggestion is seal the crack, but previously (thanx Maihcol) you have to clean the zone with alcohol or actone, using swabs or by inmersion (if there is cork, avoid, if there’s thread, remove it). let the solvent dry.
apply cyanoacrilte and let it dry. sand the excess of glue with very thin sandpaper and steelwooll 000.

anyway, here are a lot of makers and experts, let’s hear them and learn.