The schematics for different revisions of of RDDRONE-FMUK66 are available as PDF. The revision is usually printed on the PCB. Rev. D and Rev. C are currently the only supported revisions of our FMUK66.
The schematics are also available on the RDDRONE-FMUK66 product page on NXP.com, as well as the Gerber files and a Bill of Materials for this particular board (look for "Design Files / BOM").