Whenever the record discloses the failure of either party to file documents required by these Rules, respond to notices or correspondence from the Board, comply with orders of the Board, or otherwise indicates an intention not to continue the prosecution or defense of an appeal, the Board may, in the case of a default by the appellant, issue an order to show cause why the appeal should not be dismissed with prejudice for failure to prosecute. In the case of a default by the Government, the Board may issue an order to show cause why the Board should not act thereon pursuant to Rule 16. If good cause is not shown, the Board may take appropriate action.