Air sacs can "heal", basically seal over. They don't have any blood supply so they don't actually repair themselves. I'd just try getting some hydration and nutrition into her and let her rest and her body do what it can. If she will drink but not eat, go for Pedialyte or make your own...
She may have ruptured air sac(s). Other than keeping the wounds clean (I'd boil them out with a hydrogen peroxide/iodine mixture before applying antibiotic cream) and keeping her warm, there's not much else to be done. Barring vets/radiographs, etc. If there's anything she espcially loves to...