Federal Aviation Administration – Airport Improvement Program (FAA-AIP) FAA – AIP Buy American Preference Requirements (including Waivers and Federal Register Notices) 49 U.S.C. § 50101 Buy American Preferences Buy American Guidance AIP Handbook, Change 1, Appendix X (see pdf pages 571-574 of 586) Buy American Product Content Percentage Worksheet (Form 5100-136) Buy American Final Assembly Questionnaire (Form 5100-137)