{"data":{"id":"us/14-cfr-27.505","jurisdiction":"us","citation":"14 CFR 27.505","heading":"Ski landing conditions.","body":"If certification for ski operation is requested, the rotorcraft, with skis, must be designed to withstand the following loading conditions (where P is the maximum static weight on each ski with the rotorcraft at design maximum weight, and n is the limit load factor determined under § 27.473(b).\n(a) Up-load conditions in which—\n(1) A vertical load of Pn and a horizontal load of Pn/4 are simultaneously applied at the pedestal bearings; and\n(2) A vertical load of 1.33 P is applied at the pedestal bearings.\n(b) A side-load condition in which a side load of 0.35 Pn is applied at the pedestal bearings in a horizontal plane perpendicular to the centerline of the rotorcraft.\n(c) A torque-load condition in which a torque load of 1.33 P (in foot pounds) is applied to the ski about the vertical axis through the centerline of the pedestal bearings.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 27—AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT","Subpart C—Strength Requirements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"c2bdc1abd4eeb19721687e63fea688cb2a4222a1bdda71eaa9de0f3c16fa3dd8","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-27.501","next":"us/14-cfr-27.521"},"notice":"GroundRules: Original legal text. Not legal advice."}