WASHINGTON, Jan 22 (Reuters) - President Donald Trump's

nominee to head the U.S. Transportation Department said he will

keep in place a cap on production on Boeing 737 MAX

planes until he satisfied it can be safely raised.

"The cap will be maintained and will be lifted when I, in

consultation with the career safety experts at FAA and the

Administrator, have confidence that a production increase will

not reduce the quality of the aircraft being produced," said

former Representative Sean Duffy in written comments submitted

to the Senate Commerce Committee.