The Justice Department says Boeing violated the terms of the settlement agreed over two fatal crashes of 737 Max aircraft.
The settlement allowed the company to avoid a criminal trial.
Boeing agreed a $2.5 billion settlement with the DOJ in 2021 and so avoided prosecution for misleading regulators.
The Justice Department could now file charges against the plane maker.
DOJ prosecutors will file their decision with federal court by early July it said.
The Boeing 737 Max has been under increased scrutiny this year after a door plug blowout on an Alaska Airlines plane in January.
“The Government is determining how it will proceed in this matter,” the Justice Department filing said.
As part of the $2.5 billion settlement, Boeing paid $500 million for a victim compensation fund and nearly $1.8 billion to airlines due to the long grounding of the aircraft.
