The Federal Housing Finance Agency is pondering a proposed principal-paydown plan to assist underwater homeowners holding Fannie Mae or Freddie Mac mortgages who have filed for Chapter 13 bankruptcy protection.The plan – based on a proposal pitched to the FHFA in November by Rep. Zoe Lofgren, D-CA, and the National Association of Consumer Bankruptcy Attorneys – would lower a borrower’s mortgage payments under a five-year bankruptcy repayment schedule.An FHFA spokesman confirmed to Inside The GSEs this week that “the NACBA proposal is under discussion” by the Finance Agency but offered no additional details.