Final testing of modifications to address the problems of pogo oscillation, ruptured fuel lines, and bad igniter lines took place on December 18, three days before the scheduled launch.
fˈaɪnəl tˈɛstɪŋ ʌv mˌɑːdɪfɪkˈeɪʃənz tʊ ɐdɹˈɛs ðə pɹˈɑːbləmz ʌv pˈoʊɡoʊ ˌɑːsɪlˈeɪʃən, ɹˈʌptʃɚd fjˈuːəl lˈaɪnz, ænd bˈæd ɪɡnˈɪɾɚ lˈaɪnz tˈʊk plˈeɪs ˌɔn dᵻsˈɛmbɚɹ ˈeɪtiːn, θɹˈiː dˈeɪz bᵻfˌoːɹ ðə skˈɛdʒuːld lˈɑːntʃ.