BendixKing CAS 66A - Manual (Page 11)

SL B In sensitivity level B, TCAS I performs surveillance and tracking
functions and provides traffic advisories. The conditions for sen-
sitivity level B are based on own aircraft in-flight and:
(1) If radio altitude source is installed and own aircraft altitude is
above 2,000 feet AGL (radio altitude).
(2) If radio altitude source is NOT installed and own aircraft has
Landing Gear Retracted.
(3) If the aircraft has a fixed landing gear and no radio altimeter is
installed.
Table 1: TCAS Sensitivity Levels
Sensitivity
Level
CONDITIONS FOR TRAFFIC ADVISORIES (TAs)
SL A The following conditions cause TCAS I to generate a TA in sensi-
tivity level A:
• TCAS calculates that if current closing rate is maintained, sep-
aration of less than 600 feet in altitude between own and
Intruder will occur in 20 seconds.
• Separation between own and Intruder is less than 1200 feet in
altitude and less than 0.20 nautical mile range.
• NAR (Non-Altitude Reporting) Intruder is within 15 seconds or
0.20 nautical mile range.
SL B The following conditions cause TCAS I to generate a TA in sensi-
tivity level B:
• TCAS I calculates that if current closing rate is maintained, sep-
aration of less than 800 feet in altitude between own and
Intruder will occur in 30 seconds.
• Separation between own and Intruder is less than 800 feet in
altitude and less than 0.55 nautical miles in range.
• NAR (Non-Altitude Reporting) Intruder is within 20 seconds or
0.55 nautical mile range.
Standby
or Fail
• TAs are not generated.
Mode
Table 2: Typical Traffic Advisory Conditions for Sensitivity Levels
Theory of Operation and Symbology CAS 66A Pilot's Guide
Effective Date 6/94 006-08746-0000 Rev 2 7
TCAS I Pilots Guide 2/8/06 3:52 PM Page 7