It may need an alignment but that shouldnt have anything to do with your flapping noise.

Look for paper or plastic hung up beneath the car or for loose belly pans or wheel well liners.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)