Navigation Flashcards
When the mode selectors are positioned to NAV during a full alignment, what indication should be noted on the panel?
The ON BAT illuminates momentarily followed by three align lights on each respective IR
How many ADIRUs are on the aircraft?
3
What does the ON BAT light indicate?
One or more IRs is being supplied only by the aircraft battery. It illuminates momentarily at the beginning of a full alignment
If the ADIRS switches are already in NAV, how do you accomplish a rapid alignment?
Select the Mode selectors OFF then back on within 5 seconds and select ALIGN IRS on INIT page.
What would occur if the pilot were to take longer than 5 seconds to cycle any of the Mode selectors from OFF back to NAV?
The affected IRS would initiate a full alignment.
Can the present position be entered through the ADIRU panel or must we use the MCDU?
Present position may be entered in the ADIRU through the numeric keypad
Does the center OFF/1/2/3 switch turn the GNADIRS unit off?
No, only the upper display
What would cause an ADIRS ALIGN light to flash?
IR alignment fault, or no present position entry after 10 min, or difference between position at shut down and entered position exceeds 1 deg of latitude or longitude.
The entered position causes the ALIGN lights to flash. If the coordinates are correct, how is the problem corrected?
Check the city pairs and re-enter if necessary
What would a steady FAULT light in the #1 IR indicate?
The respective IR is lost
Would a fault in the #1 IR cause the #1 ADR to fail?
No, they are independent systems
What would a flashing IR FAULT light indicate?
Attitude and heading may be recovered in the ATT mode
Are we allowed to pushback during the alignment process?
No, movement will cause the system to fault.
After selecting the IR MODE selectors to NAV, when should you select ALIGN IRS on the INIT A page?
Immediately after selecting NAV to avoid excessive ADIRS drift.
If you were to rotate the #1 IR mode rotary switch to OFF, would that affect the #1 ADR?
Yes, although they are independent systems, they share an on/off switch.
If IR #1 were to fault in flight, what info would be lost on the #1 PFD? How is it displayed?
Attitude and heading info is lost. Red ATT and HDG flags replace attitude and heading info on the PFD.
What IR info may be recovered if an IR fault lit is flashing?
Attitude and heading may be possibly recovered by turning the rotary IR selector to ATT.
If IR #1 were to fault in flight, the DDRMI will show a compass card flag. Why?
The DDRMI will show a compass card flag because IR #1 drives the DDRMI compass card until it is switched
Are the IR track, wind, and heading displayed on the IR overhead panel relative to true or magnetic?
True
If the GPWS SYS pb is selected OFF, what is inhibited?
All basic GPWS alerts (modes 1-5) are inhibited.
What is the purpose of the FLAP MODE pb?
To inhibit nuisance warnings when ECAM calls for a reduced flap setting for landing.
What is the purpose of the LDG FLAP 3 pb?
It is used when making a landing in CONFIG 3.
If a TERR fault light illuminated, would that affect the basic EGPWS modes?
No
Where is ILS 1 and 2 info displayed?
ILS1 is displayed on the Capt PFD and the FO ND. ILS 2 is displayed on the FO PFD and the Capt ND.
