Flakey quick bread

I'm using Gold Medal all purpose flour for quick breads using Baking powder. All is well, rises perfectly, looks good, nice crust, nice crumb, tastes just fine. But, the bread is not "solid." When I turn the loaf to cut a piece off it breaks apart, separates, does not stay intact. Crust separates from crumb and crumb is flakey and easily crumbles. Has happened several times. I