SURVEILLANCE Flashcards
If the XPDR mode selector is set to STBY, what does the transponders do then?
Both XPDRs are electrically supplied but do not operate
If the XPDR mode selector is set to ON, what does the transponders do then?
The selected transponder operates
Within what range does the ATSAW (Airborne Traffic Situational Awareness) scan for traffic?
30nm either sides,100nm longitudinal and 9900 ft altitude range
What two computers does the TCAS system consists of?
TCAS and ATSAW (Airborne Traffic Situational Awareness)
What does the ADS-B OUT function do?
Transmitts traffic surveillance data to ATC ground stations and to other aircrafts
What does the ADS-B IN function do?
Display enhanced information on the surrounding traffic
What is the difference in symbology for TCAS Only and TCAS + ADS-B?
TCAS +ADS-B combines TCAS symbols and an aircraft symbol
In what three different states can ATSAW symbols be displayed?
Basic: with altitude information
Extended: With added tail nr information
Full: Additional Groundspeed and wake turbulence category
What does the TRAFFIC SELECTOR function do?
Enables you to highlight an ATSAW symbol on the ND with the Full information set such as GS and wake turbulence category
How do you access the ATSAW function on the MCDU?
Via the MCDU MENU page
What is the GCS system for the Weather Radar?
Ground Clutter Suppression
Removes ground returns on the ND, allowing for lower tilt angles than normal.
What does the CAL switch do on the Weather Radar?
Automatically adjusts the gain based on aircraft altitude, geographical area, season and time of day
What is the MULTISCAN function on the Weather Radar?
Uses two beams and combines their data. They scan at different altitude levels
The upper detects short range weather and the lower, long range weather.
With the Weather Radar MULTISCAN mode set to Manual, what functions are lost?
GCS function is lost
The automatic CAL function is lost even with the setting to CAL
When will the PWS function operate?
- PWS switch is in the AUTO position, even if the WX Radar is OFF
- Aircraft is below 2300 ft
- Either engine is running
How far ahead of the aircraft does the PWS scan?
5 nm
When are PWS alerts inhibited on take-off?
Above 100 kts up to 50 ft
What is the PWS Caution Aural alert on ground and in the air?
“MONITOR RADAR DISPLAY”
What is the PWS Warning Aural alert on ground?
“WINDSHEAR AHEAD” x 2
What is the PWS Warning Aural alert in the air?
“GO AROUND WINDSHEAR AHEAD”
Below what altitude is Predictive Windshear caution/warning active?
Active below 1’200 ft. Starts scanning from 2’300 ft on approach but no alarms until below 1’200 ft
In what area is the Predictive Windshear caution and warning alerting for on the ground?
Caution looks 25 degrees either side starting 0,5nm from the aircraft out to 3nm
Warning looks in a narrow band of 0,25nm either side of the aircraft out to 3nm
In what area is the Predictive Windshear caution and warning alerting for in the air?
Caution looks 25 degrees either side starting 0,5nm from the aircraft out to 3nm
Warning looks in a narrow band of 0,25nm either side of the aircraft out to 1,5nm
Through which aircraft system is Reactive Windshear alerted?
GPWS Mode 7
Below what altitude is Reactive Windshear active?
Below 1’500 ft
How is turbulence displayed on the weather radar?
In magenta
Within what distance is turbulence displayed on the WX Radar?
40 nm
What is a PAC (Path Attenuation Compensation) alert on the WX Radar?
The PAC alert displays a yellow arc on the outermost scale on the ND when an intervening rainfall creates an attenuated area behind a storm cell
What does the hazard function do on the weather radar?
Reflectivity color of the weather is increased in case of lightning, hail or turbulence to better assess relative intensity of a cell. Active out to 320 nm.
Yellow parts might become red and green parts might become yellow
What is the “associated threat assessment” on the weather radar?
Paints red dots over an area of potential lightning and icing
What is the “Predictive Overflight Icon” on the WX Radar?
It shows at red dotted area icon where a fast growing cell might be present.
How is Severe and Moderate Turbulence Displayed on the WX Radar?
It provides two levels of turbulence
Basic plain magenta: Severe turbulence
Speckle magenta: Moderate Turbulence
How many modes does GPWS have?
7
What descent rates are considered excessive with regards to GPWS at low altitude?
2’500 fpm below 2’500 ft
Which alert have priority nr 1, 2 and 3with GPWS warnings?
Priority 1 = Mode 7 “Windshear x3”
Priority 2 = Mode 1 “Pull up” (sink rate)
Priority 3 = Mode 2 “Pull up” (terrin closure)
Describe GPWS Mode 1
Mode 1 = EXCESSIVE DESCENT RATES
Activates below 2’500 ft AGL
Has two protection envelopes:
1. “SINK RATE x 2”
2. “PULL-UP”
Describe GPWS Mode 2
Mode 2 = EXCESSIVE TERRAIN CLOSURE
Activates when terrain is within 2’000 ft of the aircraft
Has two protection envelopes:
1. “TERRAIN TERRAIN”
2. “PULL -UP”
Describe GPWS Mode 3
Mode 3 = ALTITUDE LOSS AFTER TAKE-OFF
Works from 50 ft altitude
Activates when altitude loss is 10% of altitude gained.
(A 50 ft altitude loss after 500 ft altitude gain)
Warning is : “DON’T SINK x 2”
Describe GPWS Mode 4
Mode 4 = INSUFFICIENT TERRAIN CLEARENCE. Alerts below 1’000 ft with “TOO LOW TERRAIN”
Mode 4A: “TOO LOW GEAR” below 500 ft AGL and less
than 190 kts
Mode 4B: “TOO LOW FLAPS” below 245 ft AGL kts and
less than 160 kts
Mode 4C: “TOO LOW TERRAIN” Active during takeoff and alerts when the terrain is rising more steeply than the aircraft is climbing
Describe GPWS Mode 5
Mode 5 = DESCENT BELOW GLIDESLOPE
Works below 925 ft AGL and 1.3 dots Fly Up indication
Soft warning = Below 925 ft and below 1,3 dots
Hard warning = Below 300 ft and below 2,0 dots
Will reset below 50 ft, above 1’900 ft and when selecting a VOR frequency
Describe GPWS Mode 6
Mode 6 = ADVISORY CALLOUTS
“MINIMUMS”
“FIVE HUNDRED”
“50, 40, 30 RETARD”
“BANK ANGLE”
What does ROPS/ROW stand for?
“Runway Overrun Prevention System” with its warning system called “Runway Overrun Warning”
When does ROPS detection start and from when is the ROW function armed?
Detection starts at 2000 ft and the ROW function arms at 400 ft
Where is the ROW/ROP pb-sw located, if installed?
On the EVAC overhead panel
Within what distances/ranges is TCAS detection available?
- 30 nm either side
- 30 to 80 nm longitudinally
- +-9900 ft above and below
What is the difference with the Above, Normal and Below settings for TCAS?
Above = 9’000ft above - 2’700ft below
Normal = 2’700ft above - 2’700ft below
Below = 2’700ft above - 9’000ft below
Which one have higher priority, GPWS or TCAS?
GPWS
What should your vertical speed be within 1’000ft of your assigned altitude?
Max 1’000 ft/min
What does a hollow diamond indicate on a TCAS display?
Other traffic. More than 1’200 ft vertically and beyond 6 nm but closer than 30 nm
What does a filled diamond indicate on a TCAS display?
Proximate traffic. +-1’200 ft and within 6 nm
What is the estimated TAU before reaching CPA for a TA?
20-48 sec dependant on altitude
What is the estimated TAU before reaching CPA for an RA?
15-35 sec dependant on altitude
Below what altitude are all TA:s inhibited when climbing
600 ft
From what altitude are all TA:s inhibited when descending?
400 ft
Below what altitude are all RA:s inhibited when climbing
1100 ft
From what altitude are all RA:s inhibited when descending?
900 ft
What is the difference with the Above, Normal and Below settings for TCAS?
Above = 9’900ft above - 2’700ft below
Normal = 2’700ft above - 2’700ft below
Below = 2’700ft above - 9’900ft below
What is the difference between the “THRT” and “ALL” positions on the TCAS panel?
- THRT displays Proximate and Other intruders only if a TA or RA is present and they are within +- 2700 ft
- ALL displays all Proximate and Other intruders even if no TA or RA is present
What does an amber “TCAS” indication on the PFD altitude scale indicate?
TCAS cannot deliver RA data
When is a TCAS STBY memo displayed?
TCAS selected to STBY
Both Transponders FAIL
Both Radar Altimeters FAIL
What do you do with the FD during an RA?
Ignore it or turn it off
What principle does the windshear warning system work on?
Doppler effect of moisture ahead of the aircraft allows the radar to predict windshear ahead.
Does the WX radar have to be on for the PWS to work?
No
What happens to the GPWS functions when you get a FAULT light on the TERR pb?
All basic GPWS functions are lost but Enhanced features remain
You get a Terrain Warning, how long until impact?
30 seconds
You get a Terrain Caution, how long until impact?
60 seconds
What is the difference between the basic and enhanced GPWS?
Basic simply looks at the Radio Altimeter while enhanced looks and predicts terrain ahead.
If the TERR function of EGPWS fails, or is selected OFF, what happens to GPWS?
Inhibits the TAD and TCF modes, and does not affect the basic GPWS mode 1-5. If OFF is selected the ECAM caution NAV GPWS TERR DET FAULT is displayed.
When should LDG FLAP 3 pb be selected ON?
Flap mode (too low flaps mode 4) is inhibited, to avoid nuisance warning in case of landing with flaps setting reduced).
How is the terrain information displayed in order to prevent confusion with weather radar?
To differentiate between the terrain and the weather display, the terrain display sweeps form the center outward to both sides of the ND.
If TERR ON ND is indicating ON, what happens to the weather radar?
Weather radar image not displayed.
When will TERR ON ND automatically switch on?
If an alert is generated (caution or warning) and TERR p/b switch ON ND is not selected, the terrain and the obstacles are automatically displayed, and the ON light of the TERRN p/b switch ON ND comes on.
What happens to GPWS warnings if the loudspeakers are turned off?
The audio volume of GPWS aural warning or cautions is not controlled by the loudspeaker volume knobs.
Does a “FAULT” light on the SYS pushbutton affect the TERRAIN mode?
No
If the TERR mode failed, does it affect the basic GPWS?
No
What does an amber “FAULT” light in the SYS pushbutton indicate on the GPWS panel?
Any failure of GPWS mode 1-5
Pressing the SYS pushbutton on the GPWS panel does what?
Inhibits all EGPWS warning except TERR system
What would prevent the weather display on the ND?
Mode selector in PLAN- TERR selected ON
How many RADAR systems are installed?
How many RADAR systems are installed?
Does predictive windshear detection work when the RADAR system is switched OFF?
Yes, if the Windshear switch is in AUTO
When is the Ground Proximity Warning System (GPWS) active?
The GPWS is embedded in the TCAS system (Terrain and Traffic Collision Avoidance system) and generates aural and visual warnings between radio altitudes 10 and 2450ft.
