The exterior shots of the TWA plane indicate it is a Boeing 727-200. However the interior shots show a galley in the middle of the aircraft, which is a feature of the slightly smaller 727-100.
The word "Bundesrepublik" ("Federal Republic") on the cover of Uli's German passport is misspelled.
When Uli reads the seat allocation of the pregnant woman and her husband they are in 'B' and 'C' seats, the next scene Uli is settling them into the 'D' and 'E' seats (other side of the aisle) - an earlier reference to the 'A' seat being on 'their right' supports this.