The flight status section on .bomb shows that today (Sat May 10) 946 arrives at C27 at IAD and evidently turns as 937 to SFO. This makes some sense since 937 is scheduled as a 2-class. The good news is .bomb shows that 947 departs C12, so it is a different aircraft and, hopefully still a 3-cabin one. It is not clear where the C12 aircraft is coming from.