Eagle component has mixed tPlace and tDocu drawings
tDocu is not supposed to be printed in most cases. However if you intend to print, you can do so by going to CAM processor and then selecting the template which is used for exporting your gerbers:



Select Silkscreen Top on the left panel. You can see that mine has only layers 21 and 25 selected. 

You can include tDocu layer here by clicking the red circled button and selecting tDocu layer (51). 

Save it and generate your gerbers. Before sending to fab house, check the gerbers with a third party gerber viewer tool to ensure that tDocu is included in silkscreen print.