PDF of 168 KB for the JEDEC part 2N6667, with an RE suffix in the file name that is not explained and may simply mark a revised edition of the document. Filed under schematics, it carries no model or board data. Expect datasheet content: absolute maximum ratings, electrical characteristics and package drawing. Use it to identify terminals for testing and to confirm that a substitute is equivalent. Check the code and case style on the actual part against the sheet before replacing it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.