Navigation Flashcards
How does the FMGC compute radio position?
IRS DME/DME.
Can you turn the ADR OFF and still have the IR?
Yes.
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 ADIRU‘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
SYS pb
(GPWS panel)
- OFF
- FAULT Light
OFF:
All basic GPWS alerts (Mode 1 to 5) are inhibited.
FAULT LT:
This amber light comes on, along with an ECAM caution, if the basic GPWS mode 1 to 5 malfunction.
G / S MODE pb
(GPWS panel)
- OFF
OFF: Glideslope mode (mode 5) is inhibited.
FLAP MODE pb
(GPWS panel)
- OFF
OFF: 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
(GPWS panel)
- OFF
ON:
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.”
TERR pb
(GPWS panel)
- OFF
- FAULT Light
OFF:
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.
FAULT LT:
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
(Instrument panel)
- PULL UP Light
- GPWS Light
PULL UP:
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.
GPWS:
Comes on amber + specific voice warning when any other mode is activated.