A rotorcraft , comprising: a floor panel comprising seat attachment provisions (501-503), defining a plurality of seat locations ; and a plurality of passenger seats coupled to the floor panel , wherein: the plurality of passenger seats comprises eighteen passenger seats; the plurality of passenger seats is arranged into five seating rows, wherein the five seating rows comprise a first seating row, a second seating row, a third seating row, a fourth seating row, and a fifth seating row; the first seating row comprises one passenger seat facing a front end of the rotorcraft; the second seating row consists of four passenger seats facing a back end of the rotorcraft; the third seating row consists of four passenger seats facing the front end of the rotorcraft; the fourth seating row consists of four passenger seats facing the back end of the rotorcraft; the fifth seating row comprises five adjacent passenger seats facing the front end of the rotorcraft; the second seating row and the third seating row face each other; and the fourth seating row and the fifth seating row face each other; wherein the floor panel comprises at least one unused seat location . a floor panel comprising seat attachment provisions (501-503), defining a plurality of seat locations ; and a plurality of passenger seats coupled to the floor panel , wherein: the plurality of passenger seats comprises eighteen passenger seats; the plurality of passenger seats is arranged into five seating rows, wherein the five seating rows comprise a first seating row, a second seating row, a third seating row, a fourth seating row, and a fifth seating row; the first seating row comprises one passenger seat facing a front end of the rotorcraft; the second seating row consists of four passenger seats facing a back end of the rotorcraft; the third seating row consists of four passenger seats facing the front end of the rotorcraft; the fourth seating row consists of four passenger seats facing the back end of the rotorcraft; the fifth seating row comprises five adjacent passenger seats facing the front end of the rotorcraft; the second seating row and the third seating row face each other; and the fourth seating row and the fifth seating row face each other; the plurality of passenger seats comprises eighteen passenger seats; the plurality of passenger seats is arranged into five seating rows, wherein the five seating rows comprise a first seating row, a second seating row, a third seating row, a fourth seating row, and a fifth seating row; the first seating row comprises one passenger seat facing a front end of the rotorcraft; the second seating row consists of four passenger seats facing a back end of the rotorcraft; the third seating row consists of four passenger seats facing the front end of the rotorcraft; the fourth seating row consists of four passenger seats facing the back end of the rotorcraft; the fifth seating row comprises five adjacent passenger seats facing the front end of the rotorcraft; the second seating row and the third seating row face each other; and the fourth seating row and the fifth seating row face each other; wherein the floor panel comprises at least one unused seat location . <EOS>