[Code of Federal Regulations] [Title 14, Volume 1] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR27.399] [Page 579] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 27_AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT--Table of Contents Subpart C_Strength Requirements Sec. 27.399 Dual control system. Each dual primary flight control system must be designed to withstand the loads that result when pilot forces of 0.75 times those obtained under Sec. 27.395 are applied-- (a) In opposition; and (b) In the same direction.