[Code of Federal Regulations] [Title 20, Volume 1] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 20CFR225.52] [Page 433] TITLE 20--EMPLOYEES' BENEFITS CHAPTER II--RAILROAD RETIREMENT BOARD PART 225_PRIMARY INSURANCE AMOUNT DETERMINATIONS--Table of Contents Subpart F_Recomputing PIA's Sec. 225.52 Reasons for recomputing a PIA. There are three major reasons for recomputing a PIA: (a) Recomputation to consider additional earnings. (b) Recomputation when an employee is eligible for periodic pension payments based on other than railroad or social security earnings. (c) Recomputation to use a new or different PIA formula, as provided in section 215(f) of the Social Security Act.