I just booked a ticket for a relative from Delhi to Newark on AI. It appears that AI 191 is the flight number both the DEL to BOM leg as well as the BOM to EWR. I'm assuming that this means it's one of those flights that uses the same plane and where some of the DEL to BOM passengers are only on it for the domestic leg, while others (like my relative) will be on it all the way through. Does anyone know if that's the case, and if so, if he'll stay on the plane during the stop-over? If not, what is the lounge access situation for the short stop-over in BOM for Business class?