ɪn nˈoːɹməl flˈaɪt, ðɪ ˈɛndʒɪn ɪz ɪnðə sˈɪɹiz mˈoʊd, wɪððə flˈoʊ lˈiːvɪŋ ðə fɹˈʌnt fˈæn pˈæsɪŋ dᵻɹˈɛktli ˌɪntʊ ðə sˈɛkənd fˈæn, ðɪ ˈɛndʒɪn bᵻhˈeɪvɪŋ mˈʌtʃ lˈaɪk ɐ nˈoːɹməl tˈɜːbɑːfən.
In normal flight, the engine is in the series mode, with the flow leaving the front fan passing directly into the second fan, the engine behaving much like a normal turbofan.