FAA TSO C50C PDF

Applicability.

(1) Minimum Performance Standard. This Technical Standard Order (TSO) prescribes the minimum performance standard that audio selector panels and amplifiers must meet in order to be identified with the applicable TSO marking. This TSO has been prepared in accordance with the procedural rules set forth in Subpart O of the Federal Aviation Regulations (FAR) Part 21. New models of audio selector panels and amplifiers that are to be so identified and that are manufactured on or after the date of this TSO must meet the applicable standard set forth in Radio Technical Commission for Aeronautics (RTCA) Document No. DO-170, “Audio Systems Characteristics and Minimum Performance Standards Aircraft Microphones (Except Carbon), Aircraft Headsets and Speakers, Aircraft Audio Selector Panels and Amplifiers,” dated January, 1980, as amended and supplemented by this TSO.

(2) Additions.

(i) In addition to paragraph 1.0, General Standards, of RTCA Document No. DO-170, all materials used except small parts (such as knobs, fasteners, seals, grommets and small electrical parts) that would not contribute significantly to the propagation of a fire, must be self-extinguishing when tested in accordance with applicable requirements of §§ 25.853 and 25.1359(d) and Part 25, Appendix F of the Federal Aviation Regulations effective May 1, 1972.

(ii) If the equipment design implementation includes a digital computer, the computer software package must be validated and verified in a manner acceptable to the Administrator. An acceptable means of compliance for validation and verification of the computer software package is contained in RTCA/DO-178, “Software Considerations in Airborne Systems and Equipment Certification”, November 18, 1981.

(3) Exception. The conditions and procedures prescribed in RTCA Document No. DO 160A, “Environmental Conditions and Test Procedures for Airborne Equipment,” dated January 1980 are to be utilized for this TSO.