AC 20-151B

Historical

Advisory circular · Airworthiness Approval of Traffic Alert and Collision Avoidance Systems (TCAS II), Versions 7.0 & 7.1 and Associated Mode S Transponders

A newer version is currentThis is a historical version. AC 20-151C is the version in force, approved July 21, 2017.
Approved
March 18, 2014
Last reviewed
July 7, 2017
Cancels
AC20-151A
Cancelled by
AC20-151C
Family
AC 20-151 · 4 versions
Revision
B
14 CFR parts
25
Cited by
1 AD

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed July 7, 2017.

Show pages 59–70

Appendix E aa. Traffic. Aircraft with an operating transponder capable of being tracked and displayed by a TCAS-equipped aircraft.

bb. Traffic advisory (TA). Aural voice and display information from TCAS II to a flight crew, identifying the location of nearby traffic meeting certain minimum separation criteria.

cc. Traffic display. Horizontal position of transponder-equipped aircraft relative to the TCAS II equipped aircraft.

2. Acronyms.

Table E-1 Acronyms.

Acronym Definition 14 CFR Title 14 of the Code of Federal Regulations ACARS Aircraft communications addressing and reporting system ADS-B Automatic dependent surveillance - broadcast AFM Airplane flight manual AFMS Airplane flight manual supplement AGL Above ground level ASR Airport surveillance radar AMC Acceptable Means of Compliance ATA Air Transport Association ATC Air traffic control ATCRBS Air traffic control radar beacon system CAS Collision avoidance algorithm , or CAS logic CMC Central Maintenance Computer CRS CAS requirements specification dB Decibel EADI Electronic attitude display indicator EFIS Electronic flight instrument system EHSI Electronic horizontal situation indicators EMI Electromagnetic interference FAA Federal Aviation Administration FD Flight director FHA Functional hazard assessment FL Flight level E-3

Appendix E Table E-1 Acronyms. (continued) FMEA Failure modes and effects analysis FPM Feet Per Minute GPS Global positioning system GPWS/TAWS Ground proximity warning system/terrain awareness warning system HUD Heads-up device ICAO International Civil Aviation Organization IVSI Instantaneous vertical speed indicators JAA Joint Aviation Authorities MHz Megahertz NAS National Aerospace System ND Navigation display NM Nautical mile PFD Primary flight display RVSM reduced vertical separation minimum RA Resolution advisory SARP Standards and Recommended Practices STC Supplemental type certificate TA Traffic advisory TC Type certificate TCAS II Traffic alert and collision avoidance system TSO Technical standard order TTP TCAS transition program Vmo Maximum operating limit speed E-4