HelicoptersTrackingC/N Tracking CHI Aviation BoeingBCH-47D Chinook M.3187 N947CHBoeingBCH-47D Chinook M.3459 N950CHSikorskyS-61N 61-490 N906CHSikorskyS-61N 61-761 N761HG SikorskyS-61N Mk.II 61-711 N905CH @ (optional) Send