A Practice Note about performance-based action appeals before the Merit Systems Protection Board (MSPB) under the Civil Service Reform Act (CSRA). This Note identifies the performance-based actions appealable to the MSPB (sometimes called Chapter 43 appeals) and the types of federal employees that have MSPB appeal rights, as well as the burdens of proof that apply to the federal agency and the employee. It also discusses federal law and procedures applicable to federal sector employees.