Regarding re-taking the knowledge ("written") test, or finding old test results:
Replace a Knowledge Test Report
If your test was taken on or after January 13, 2020, log into your PSI account. You can print a duplicate or expired test report (AKTR)
https://faa.psiexams.com/faa/login.
If your test was taken on or before January 10, 2020, send an email to
[email protected]?subject=Mes...from%20FAA.gov. The email must include full name test was issued to, date of birth and type of test, including date test was taken.
If you have additional questions, call our office Toll Free: (866) 878-2498.
https://www.faa.gov/licenses_certifi...ts_replacement
For the instrument airplane written, one needs either a graduation certificate from an FAA approved ground school, or an instructor endorsement. To re-take the test, one of three things can be used: passing test results from the previous attempt, expired test results from the previous attempt, or failed test results from the previous attempt. The latter requires an instructor endorsement to re-test.
https://www.faa.gov/training_testing...testing_matrix