(Reuters) -Embraer said on Thursday it would announce what it described as a "milestone" for the Brazilian planemaker in Washington next week.

Embraer, which assembles some business jets in Florida, declined further comment on the planned announcement but industry sources said it was expected to focus on boosting U.S. manufacturing jobs through its commercial aircraft subsidiary.

The September 10 announcement will coincide with a major gathering of aerospace leaders in the U.S. capital and comes at a time when the world's third largest planemaker is lobbying to remove 10% tariffs on its planes imposed by the Trump administration.

The announcement will be "the first of its kind ever made in the United States," Embraer said in a media advisory.

Domestic and foreign aerospace firms alike have been promoting investments in the United States to ease pressure on the highly globalised sector from U.S. President Donald Trump's "America First" economic policies, though analysts caution some of the newly announced investments were already in the pipeline.