snacker, that looks like a easy fix,one I have done a couple of times on my NEXTAR,before I turned it into a float plane.
one thing to keep in mind when you glue the gear retainer assembly back together make sure the gear leggs are tight in the slot at the fuselage and the pressure plate, the plywood piece, isn't loose.

if the gear leggs are too loose they won't snap in properly and can fall out in flight,I used wax paper to prevent the glue from sticking to the gear when I was repairing mine.

if you still have the broken sheeting then carefully put them back together and use thin CA glue to reassemble the parts.

if not, then when you replace the broken section, if you wet the replacement sheeting with a alcohol and water mix the balsa will become very pliable to bend around the curve of the fuse, if I am doing a curve I usually tape the piece around the area and let it dry overnight then you have a nicely formed piece of wood.

I crashed a rebuilt several parts of my NEXTAR and flew it for Quite a while as a trainer, it was a real warhorse for me