twa flight 841 was a domestic, scheduled passenger flight from john f. kennedy international airport in new york city, en route to minneapolis-saint paul international airport in minneapolis, minnesota. on april 4, 1979, at or around 9:48 p.m. eastern standard time (01:48 utc), while flying over saginaw, michigan, the boeing 727-31 airliner began a sharp, uncommanded roll to the right, and subsequently went into a spiral dive. the pilots were able to regain control of the aircraft and made a successful emergency landing at detroit metropolitan airport.