It is possible to repair a broken bird wing by creating a wrap to hold the fractured bones in place. The best form of treatment is to take the bird to a veterinarian for professional care as performing the wrap method incorrectly results in permanent major damage.
To wrap a broken wing, use strips of cotton gauze, and wrap the wing in a figure-eight pattern three times. Cover the gauze with a layer of Vetrap, and then wrap a layer around the wing and body to seal everything in place. Do not wrap the wing too tightly, or the bird may not be able to breathe.