Provided is an apparatus to interface a boarding bridge having a first deck and an airplane having a second deck. The apparatus includes a lower-frame assembly, upper- frame assembly, bridge gangplank assembly, and airplane gangplank assembly. The lower-frame assembly includes a plurality of wheel assemblies. The upper-frame assembly is connected to the lower-frame assembly at adjustable height and pivoting position, and includes a third deck atop the upper-frame assembly. The bridge gangplank assembly is connected to a first end of the upper-frame assembly, and includes a fourth deck to connect the first deck and the third deck. The airplane gangplank assembly is connected to a second end of the upper-frame assembly, and includes at least a fifth deck to connect the third deck and the second deck.