FAA TSO C117B PDF

PURPOSE.

This technical standard order (TSO) is for manufacturers applying for a TSO authorization (TSOA) or letter of TSO design approval (LODA). In it, we (the Federal Aviation Administration, (FAA)) tell you what minimum performance standards (MPS) your airborne windshear warning and escape guidance systems for transport category airplanes must first meet for approval and identification with the applicable TSO marking. This TSO defines performance, functions, and features for systems providing windshear warning and escape guidance commands based upon sensing the airplane’s encounter of such phenomena. It is not applicable to systems that look ahead to sense windshear conditions before encountering the phenomenon nor to systems using atmospheric and/or other data to predict the likelihood of a windshear alert.

Appendix 1 of this TSO describes the MPS for the airborne windshear warning and escape guidance systems for transport category airplanes. Appendix 2 of this TSO describes the wind field models used to evaluate the performance of the windshear warning and escape guidance system. Appendix 3 of this TSO describes the conversion of the velocity equations in Appendix 2 to rectangular coordinates. Appendix 4 of this TSO contains data defining the Dryden turbulence model and discrete gust model used in conducting the windshear alert tests. Appendix 5 of this TSO describes shear intensity. Appendix 6 of this TSO provides a sample computer listing for a simplified aircraft simulation model for evaluating the effectiveness of various guidance schemes.