Like the 1900, the 1900C was certified under SFAR 41C, but the later 1900D version was certified to FAR Part 23 "Commuter Category" standards.
Sama seperti 1900, 1900C juga disertifikasi berdasarkan SFAR 41C, namun kemudian versi 1900D memperoleh sertifikasi FAR Bagian 23 standard "Kategori Komuter".