Airworthiness Directive Proposal for Allied Signal Commercial Avionics Systems CAS-81 TCAS on Transport Category Airplanes

Summary

The Federal Aviation Administration proposes to revise an existing airworthiness directive for transport category airplanes equipped with Allied Signal Commercial Avionics Systems CAS-81 Traffic Alert and Collision Avoidance Systems (TCAS), addressing reports of audio output failure, to ensure flightcrew awareness of potential hazards and procedures for addressing the issue.