If you fly under Part 91, you only need to complete a Biennual Flight Review (FAR 61.56).
If you fly under FAR Part 121 or 135, your proficiency checks under these parts meet the requirements of FAR 61.56.
If you have a type rating on your ATPL, you must complete 12 month and 24 month checks (61.58). This requirement is met if you are flying this aircraft under FAR 135/121.
Last edited by Check 6; 7th May 2003 at 01:21.