Passenger boarding bridge with laterally adjustable cab portion

A cab for serving as a portal between an aircraft passenger boarding bridge walkway and an aircraft exterior cabin door to permit passengers to board the aircraft from the walkway, the walkway having one end attached to a passenger terminal building and its opposite end extending out from the passenger terminal building, the cab comprising:

• a passageway including a floor, a ceiling opposing the floor, a first sidewall, and a second sidewall opposing the first sidewall, the passageway sized to permit a person to pass therethrough and having a first opening for coupling to the walkway opposite end, and a second opening defined by edges of the floor, the ceiling, the first sidewall, and the second sidewall for being positioned in a direction toward the aircraft exterior cabin door;
• a second frame coupled to the first sidewall;
• and
• a first frame coupled to at least one of the floor, the ceiling, and the second sidewall, wherein at least one of the first and second frames are for being attached to the walkway opposite end in a manner to support lateral movement of the second frame relative to the walkway opposite end and relative to the first frame, so as to permit lateral movement of the first sidewall relative to the at least one of the floor, the ceiling, and the second sidewall.