Southwest Airlines Boeing 737-8H4 SSWL N8645A (msn 36907) “Heart Two” BWI (Tony Storck). Image: 924455. Posted on September 15, 2014 by Bruce Drum Posted in Southwest Airlines Tagged 36907, 737, 737-800, 737-8H4, Baltimore/Washington, Boeing, Boeing 737, Boeing 737-800, BWI, Heart Two, N8645A, New Color Scheme, New Livery, Southwest Airlines Leave a comment Copyright Photo: Southwest Airlines Boeing 737-8H4 SSWL N8645A (msn 36907) “Heart Two” BWI (Tony Storck). Image: 924455. Rate this: Related