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AF (4) The TTR PASS LED indicator stays on if there is no failure to the AF TCAS computer or other essential system that interface with TCAS. AF (5) The applicable LED failure indicator comes on if there is a failure. AF
(a) LEDs _______
____ FAILURE AF AF TTR PASS........................TCAS OK (NO FAILURE) AF TTR FAIL........................TCAS COMPUTER AF XPNDR...........................ATC TRANSPONDER OR DATA LINK AF INTERFACE AF UPPER ANT.......................TOP TCAS ANTENNA AF LOWER ANT.......................BOTTOM TCAS ANTENNA AF RAD ALT.........................NO RADIO ALTITUDE DATA AF HDNG............................NO HEADING DATA AF R/A.............................RA DISPLAY AF T/A.............................TA DISPLAY AF AF 3. ___________________
Directional Antenna (Fig. 1) AF A. The directional antenna is an electronically steerable phased array that AF has four top loaded monopole elements. The directional antenna is AF connected to the TCAS computer with four coaxial cables that have TNC AF plugs on the antenna end. AF B. The TCAS uses two directional antennas. One is installed on top and the AF other is installed on the bottom of the airplane. These antennas AF transmit to and receive signals from intruder airplanes. AF C. Each of the four elements of the directional antenna has a resistor that AF goes from the antenna element to ground. Each of the four resistors has AF a different value. The TCAS computer regularly does a continuity test on AF the antenna ports and will see the corect resistance value if the port is AF not shorted and not open. AF 4. _________
RA/TA VSI (Fig. 3) AF A. One RA/TA VSI is installed on each pilot's instrument panel. The AF Vertical Speed Indication is always shown on these instruments regardless AF of the ATC/TCAS control panel function selector position. AF B. The traffic are displayed on the center of the instrument and resolution AF advisories graphic bands are displayed around the vertical speed scale. AF C. TCAS traffic are shown on the RA/TA VSI when the ATC/TCAS control panel AF function selector is either on TA ONLY or on TA/RA position. Resolution AF advisories are shown only if the selector is on TA/RA position. The red AF band is the vertical speed range to avoid. The green band is the AF vertical speed range the pilots must attain. AF D. TCAS Indications:
EFFECTIVITY
AF, AT, GN, MD, VN, ALL AIRPLANES WITH AEB ATG X Page 6 34-588 Apr 25/96
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F71364
..........................................................................................................AF
b a
m
l
k
INTRUDERS:
WHITE DIAMOND
RED SQUARE
WHITE DIAMOND
(OPENED) YELLOW CIRCLE
f
g
h i o
RA/TA VSI Figure 3
EFFECTIVITY
AF, AT, GN, MD, VN, ALL AIRPLANES WITH AEB 01 X Page 7 34-588 Apr 25/96
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INDICATION DESCRIPTION___________
AF
__________ AF AF (a) DISPLAY PHOTOCELL - Automatic brightness adjustment AF (b) IVSI SELFTEST - Reserved for maintenance shop AF (c) V/S (yellow) - Vertical spped indications fail AF (accompagnied by RA OFF indication). AF (d) V/S POINTER - Indicates vertical speed AF (e) V/S SCALE - V/S range is +6000 to -6000 ft/mn. AF (f) RA FAIL (yellow) - Resolution Advisory function fails AF (g) Mode indication: AF TCAS FAIL (yellow) - TCAS computer fails AF TD FAIL (yellow) - Traffic function fails AF TCAS OFF (white) - TCAS function not selected AF RA OFF (white) - RA function not selected AF TEST (white) - TCAS system self test is running AF (h) TA ONLY (yellow) - Traffic Advisory ONLY mode AF (i) RANGE CONTROL - Increase pushbutton AF (j) RANGE CONTROL - Decrease pushbutton AF (k) OFF SCALE (white) - When intruder is out of display range AF (l) GREEN BAND - Vertical speed range to attain AF (m) RED BAND - Vertical speed range to avoid AF (n) RANGE - Selected range in NM AF (o) 2 NM RANGE RING - Displayed with any range selected AF (p) AIRCRAFT SYMBOL - Own aircraft symbol AF (q) TA X.X +XX1 or 1 - A no bearing intruder airplane AF (yellow) with a TA classification. AF RA X.X +XX1 or 1 - A no bearing intruder airplane AF (red) with a RA classification. AF (r) Intruder symbol: - See figure for details. AF OPEN WHITE DIAMOND - Non-Threatening traffic distance AF greater than 6 NM or relative AF altitude greater than +/- 1200 feet. AF FILLED WHITE DIAMOND - Non-Threatening traffic with a AF distance less than 6 NM and relative AF altitude less than +/- 1200 feet. AF FILLED AMBER CIRCLE - Approaching intruder airplane close AF enough to be of concern. AF FILLED RED SQUARE - An immediate threatening traffic that AF requires evasive action.
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