Пишут, что не совсем так.
"Later Digital FDR's (late 200's & classics) record onto a 1/4-inch wide, 450 feet long magnetic tape and the newest Solid State FDR's (later classics & NG's) record data onto memory chips."
Отсюда: [Вurl]http://www.b737.org.uk/flightinsts.htm[/url]