US immigration during technical stop
Hello all,
i have a brief question on current US imigration policy during an unscheduled technical stop.
The situation is as follows: a twin-jet going from Frankfurt, Germany to the easten seaboard. Due to a lower than usual flight level issued by Shanwick, we need to refuel before reaching our destination. If we'd have to land in let's say Boston before going further down, would our pax have to clear US immigrations first and would we be considered a domestic flight on the final leg? I know that during unscheduled stops in the US they check the manifest against the nofly list, even when you fly onwards to a non-US destination, but how if you fly to the US anyways?
Any pointers to the applicable legislation or FAA/TSA/whatever regs would be very much appreciated.
Salina :-)
WSSS