According to the IRS site, you do not have to file FBAR form 114 for retirement accounts. See:
Report of Foreign Bank and Financial Accounts (FBAR) | Internal Revenue Service (irs.gov)
I also believe that the same holds for FATCA 8938, by the same reasoning. But I could not find anything on the IRS site yet. BTW, the TurboTax software does not differentiate between retirement and non-retirement accounts, so all foreign accounts are reportable.
