The Boeing 747-100B SUD is the stretched-upper-deck branch of the strengthened 747-100B, certified by the FAA as a distinct transport series. It preserves the classic 747-100B airframe while extending the upper deck for additional passenger capacity, and remains separate from the 747-200B, 747-300, 747SR, and later 747-400 branches.
Alerts for directly linked future launches and major activity.