Boeing is planning a more comprehensive software update to its 737 Max planes.
The redesign comes after the US FAA uncovered a new issue, according to multiple reports.
Boeing is redesigning the flight control system to take the input from two computers during a flight instead of just one.
The FAA uncovered a new issue with the planes in June.
The new issues added to Boeing's problems following the two fatal crashes by the planes that killed 346 people.