TCAS Flashcards
Block Altitude Range
9000 above to 9000 below
Normal Altitude Range
2700 above to 2700 below
Above Altitude Range
8700 above to 2700 below
Below Altitude Range
2700 above to 8700 below
When is the white arrow displayed to the right of the intruder symbol
Vertical Velocity of 500 FPM or greater
What changes when FL is activated
White relative altitude arrow is replaced with intruders own reported altitude in FL format
What are the intruder display priorities
1 Threat aircraft at RA level
2 Threat aircraft at TA level
3 Proximity intruders
4 Nonthreat intruders
How are intruders with no valid bearing data displayed
Intruders with no valid bearing data are listed on either side
of the EHSI/HSD with the relative altitude, intruder symbol,
and arrow, followed by the range in nm displayed in a
row. The data is boxed in the same color as the intruder
symbol color. Up to 10 rows can be displayed at any time,
five each to the left and right side of the EHSI/HSD with
the first at top left, the second at top right, the third at
second top left, etc. The order is according to the following
priority:
a. RA
b. TA
c. Proximity
Nonthreat category aircraft are not displayed. If more than
10 intruders need to be displayed, the top priorities are
displayed. The intruders of the lowest priority detected last
are not displayed.
Which TCAS antenna senses bearing and range
Upper antenna on nose
How are intruders beyond selected range displayed?
TA, RA, proximity aircraft, and, in some cases, nonthreat
aircraft that are beyond the display scale, are represented by
half the intruder symbol with the attached data (relative
altitude and arrow). Nonthreat aircraft become half the
intruder symbol on the PFR display only
Up to how many intruders can TCAS display as intruders
30
What is the maximum surveillance range of the TCAS
40 nm
How many intruders can TCAS system track (not display)?
Up to 60
Symbol for nonthreat aircraft
Open white diamond
Symbol for proximity aircraft
solid white diamond
Symbol for threat aircraft at TA level
solid yellow circle
Symbol for threat aircraft at RA level
Solid red square
When do you get a Traffic Advisory
When intruding aircraft reach a point
where the system predicts the closest point of approach
(based on current flight path) to be between 20 and 48
seconds
When do you get a Resolution Advisory
When a proximity to collision situation is detected. Student guide says 10-35 seconds
When are TCAS aural alerts inhibited?
When the aircraft is on
the ground or A/A or A/G master mode
Below what altitude is the INCREASE DESCENT RA visual and aural alert inhibited
Below 1450 AGL
If RA mode is selected, the TCAS operates in TA
mode only with all aural alerts inhibited under any
of the following conditions:
- Ownship is below 900 feet AGL.
- Ownship is below 1100 feet AGL and
climbing. - The RALT is disabled via the UFCP
EGI Key Display or by selecting the
POD configuration via ML-6 on the
MFD WPN Display Page. - RALT data is not valid and the aircraft
is pitched or banked more than 30°
(TCAS assumes aircraft is at low AGL
and loss of RALT is due to bank).
At what altitude are intruders considered on-ground? (not displayed)
380 +/-20 AGL
What are the 5 TCAS modes of operation
(1) SBY —Standby
(2) A —Mode S transponder transmits in mode A without altitude reporting to ATC. No TCAS.
(3) C— Mode S transponder transmits in mode A and mode C with altitude reporting to ATC. No TCAS.
(4) TA— Traffic Advisory mode. Aircraft meeting the criteria of TA, proximity, and non-threat are displayed. RA aircraft are displayed with a TA symbol. Modes A and C are included for normal ATC functions.
(5) RA — Resolution Advisory mode. Aircraft meeting the criteria of RA, TA, proximity, and non-threat are displayed. RA aircraft are displayed with the appropriate threat symbol. Voice and RA indications on the EADI and HUD are provided. Modes A and C are included for normal ATC functions.
