SC-147, Traffic Alert & Collision Avoidance System (TCAS), established November 1, 1980, has defined and updated the TCAS and TCAS II performance standards, thereby contributing to one of the most significant advances in aviation safety in the past twenty years.

The committee has started work on a new Aircraft Collision Avoidance System for NextGen, or ACAS X.  The foundational system to be specified will be ACAS XA, with the “A” denoting active surveillance. ACAS XA will be a “drop-in” replacement for TCAS II; expected MOPS completion date – December 2018.


Co-Chair J. Stuart Searight Federal Aviation Administration
Co-Chair Ruy Brandao Honeywell International, Inc.
Designated Federal Officer Steve Plummer Federal Aviation Administration
Secretary Donna Frohlich Aurora Sciences LLC
Program Director Al Secen RTCA, Inc.


General Information

Terms of Reference March 17, 2016
Next Meeting Agenda TBD
2018 Meetings TBD



2017 Meetings September 21, 2017
2016 Meetings March 17, 2016
September 26-29, 2016
2015 Meetings January 13-15, 2015
July 14-15, 2015
September 24, 2015


For additional meeting summaries, please contact the Program Director: Al Secen