U.S. planemaker Boeing has returned to a more "dynamic" production profile after years of uncertainty surrounding setbacks to its 737 MAX passenger jet, the head of engine maker and key Boeing supplier Safran said on Thursday.

Boeing (NYSE:BA) is showing signs of renewed production momentum on its 737 Max program following years of turbulence, Olivier Andries, chief executive of French aerospace group Safran (OTCPK:SAFRY) (OTCPK:SAFRF),

Boeing’s (BA) production rate of its best-selling Max jets has almost reached the U.S. regulator-imposed monthly cap, said Olivier Andries, CEO of French firm Safran, a key supplier of engines to the planemaker.

The Justice Department advised families of victims of two 737 Max crashes that it was considering a plan to drop a previous agreement under which Boeing would have pleaded guilty.

Family members of people killed in two fatal crashes of Boeing Co.’s 737 Max jets are urging the US Justice Department to reject a possible deal that would allow the planemaker to avoid a criminal charge.