Flashcards in Navigation Deck (103)
How does the FMGC compute radio position?
Can you turn the ADR OFF and still have the IR?
How does the manual tuning work?
The crew can use the MCDU to override the FMGCs automatic selection and tuning of navaids and select a specific navaid for visual display.
How many GPS receivers are installed?
The aircraft has two independent GPS receivers. Each GPS receiver is integrated in a modular avionic unit called MMR (Multi Mode Receiver) GPS 1 receiver in MMR1 nas GPS 2 receiver in MMR2.
When is the Ground Proximity Warning System (GPWS) active?
The GPWS is embedded in the T2CAS system (Terrain and Traffic Collision Avoidance system) and generates aural and visual warnings between radio altitudes 10 and 2450ft.
During a turnaround you notice that there is a residual ground speed on both ND's. How do you correct this?
It is possible to carry out a rapid alignment by turning off all three ADIRS momentarily.
The weather radar image can be displayed on which modes of the ND?
All modes except PLAN.
How does the BACK UP TUNING work?
If both FMGCs fail the flight crew can use the Radio Management Panels RMP 1 and 2 on the pedestal for back up tuning. The CAPT RMP controls VOR 1 and ADF 1 the F/O RMP controls VOR 2 and ADF 2.
How many parts does each Air Data and Inertial Reference System (ADIRS) have?
Each ADIRU is divided in two parts either of which can work separately in case of failure in the other: The ADR part which supplies barometric altitude airspeed mach angle of attack temperature and overspeed warnings. The IR part which supplies attitude flight pathvector track heading accelerations angular rates ground speed and aircraft position.
With the DATA selector set to HDG the time remaining until the completed IRS alignment is displayed on the control display. How long does is normally take?
Approximately 10 minutes.
When are windshear alerts inhibited?
At takeoff alerts are inhibited above 100 knots and up to 50 feet. During landing alerts are inhibited below 50 feet.
What kind of information is displayed on the Integrated Standby Instrument System (ISIS)?
Attitude airspeed and mach altitude barometric pressure LS function and bugs.
What kind of information are supplied by the Air Data and Inertial Reference System (ADIRS)?
The ADIRS supplies temperature anemometric barometric and inertial parameters.
An ILS approach is being carried out. Which ILS information is currently provided to the captain?
ILS1 on the PFD and ILS2 on the ND (if selected).
How does the Predictive Windshear System (PWS) operate?
The system scans the airspace within a range of 5 NM ahead of the aircraft for windshears. Below 1500 feet when the system detects a windshear depending on the range selected on teh ND a warning caution or advisory message appears on the ND. Predictive windshear warnings and cautions are associated with an aural warning.
What occurs in case of one GPS failure?
If one GPS receiver fails the three ADIRUâ€˜s automatically select the only operative GPS receiver.
When does the Predictive Windshear System (PWS) operate?
The PWS operates when the PWS switch is in AUTO position (even if the weather radar is OFF) and the aircraft is below 2300 feet AGL and ATC is switched to ON or AUTO or XPdR or XPNDR position (depending on the ATC panel) and either engine is running.
What are the basic functions of the Ground Proximity Warning System (GPWS)?
Mode 1 - Excessive rate of decent
Mode 2 - Excessive terrain closure rate
Mode 3 - Altitude loss after takeoff or go-around
Mode 4 - Unsafe terrain clearance when nor in landing configuration
Mode 5 - Too far below glideslope
- FAULT Light
All basic GPWS alerts (Mode 1 to 5) are inhibited.
This amber light comes on, along with an ECAM caution, if the basic GPWS mode 1 to 5 malfunction.
G / S MODE pb
Glideslope mode (mode 5) is inhibited.
FLAP MODE pb
Flap mode (“TOO LOW FLAPS” mode 4) is inhibited. (To avoid nuisance warning in case of landing with flaps setting reduced).
LDG FLAP 3 pb
Flap mode is inhibited when FLAPS CONF 3 is selected (to avoid nuisance warning in case of landing in CONF 3). In this case, LDG MEMO displays FLAPS ... 3 instead of “CONF... FULL.”
- FAULT Light
Inhibits the Terrain Awareness Display (TAD) and Terrain Clearance Floor (TCF) modes. Does not affect basic modes.
If OFF is selected the ECAM caution NAV GPWS TERR DET FAULT is displayed.
TAD or TCF mode fails. The terrain is not shown on the ND. The basic GPWS mode 1 to 5 are still operative if the SYS pb OFF or FAULT lights are not illuminated.
PULL UP - GPWS pb
- PULL UP Light
- GPWS Light
Comes on red + specific voice alert when the second boundary of Mode 1 is penetrated, or when Mode 2, or any TAD or TCF alert is activated.
Comes on amber + specific voice warning when any other mode is activated.
TERR ON ND pb
The terrain is displayed on the ND, if the:
- TERR pb is selected ON, and
- TERR FAULT light is not on.
The ON light comes on.
The terrain data is not displayed on the ND.
IR 1(2)(3) Mode Rotary Selector
The ADIRU is not energized. ADR and IR data are not available.
Supplies full inertial data to aircraft systems.
ATT: IR mode supplies only attitude and heading information, if the system loses its ability to navigate. The heading must be entered through the CDU keyboard and has to be reset frequently (about every 10 minutes).
IR 1 (2) (3) LT
- FAULT Light
- ALIGN Light
With an ECAM caution when a fault affects the respective IR.
Steady: the respective IR is lost.
Flashing: the attitude and heading information may be recovered in ATT mode.
Steady: the respective IR is operating normally in align mode.
Flashing IR alignment fault:
1. no present position entry after 10 min
2. difference between IR positions
3. difference between position at shutdown and entered position exceeds 1° of latitude or longitude.
4. movement during alignment
Extinguished: Alignment has been completed.
ON BAT LT
Comes on amber when one or more IRs is supplied only by the a/c battery. It also comes on for a few sec at the beginning of the alignment, but not for a fast realignment.
DATA selector knob
This knob selects the information to be displayed in the ADIRS display window.
TEST: The ENT and CLR buttons on the keyboard come on, and the display shows all 8's.
TK/GS: The display shows true track and ground speed.
PPOS: The display shows present latitude and longitude
WIND: The display shows true wind direction and speed.
HDG: The display shows true heading and the minutes remaining until alignment is
STS: The display shows an action code.