Navigation (34) Flashcards
What is the ADAHRS and what does it provide?
Air Data, Attitude and Heading Reference System
What makes up the NAV system?
2x ADAHRS
2xRADALT
DME
GPS
2xNAV
ADF
XPDR
TCAS II
WXR
How are the Pitot Static heated?
Electrically:
Probe 1 - MAIN 1 (REPU1)
Probe 2 - ESS 2 (REPU2)
How is the ESIS powered in an emergency?
Battery kit - 30 mins
What components make up the Air Data System?
- 2 OAT sensors
- 2 Alt static Sources
- 2 Pitot static probes
- 2 ADAHRS
- ESIS
Where is ADF imbedded?
NAV 2
Which pitot provides which ADAHRS?
Onside
Do the OAT sensors feed each side?
No
Onside only
How many ways can you change the BARO
- DCP
- B Bezel keys
What happens when you change the BARO setting?
BARO flashes for 5 seconds on each PFD.
If you see 000 as black over amber on the ASI what does this mean?
- The airspeed is below 20kts
- or that the WOW is active
What does three white dashes mean on the IAS?
No computed data
How is G/S computed and what happens if it cant provide data?
- FCC
- Will show white F
What do three amber dashes in the G/S mean?
The data has failed.
How is VNE calculated?
By the CDS using current PALT and OAT to obtain a Corrected Airspeed
(Cockpit Display System)
What happens if VNE is exceeded by 1kt?
“AIRSPEED AIRSPEED” is announced
What does the IAS Trend provide?
The IAS in the next 6 seconds
How is ALTA setting displayed prior to engaging?
As a blue readout and blue bug
When does VNE Miscompare announce?
> 7kts >1s
When does IAS miscompare announce?
> 20kts >1s
When does OAT miscompare announce?
> 2deg >2s
When does ALT miscompare announce?
> 150ft >1s
You see ALT flashing between blue and black, what does this mean?
Difference between the LHS and RHS BARO >0.15 inHg (5hPa)
What consists of the attitude and direction subsystem?
- 2x ADAHRS
- ESIS
- 2x MSUs
What is the purpose of the Aircraft Personality Module (APM) and how many are there?
2, one for each ADAHRS
- Stores parameters used by ADAHRS 1&2
- Tilt angles
- MSU calibration data
- MSU Orientation
What is the MSU (Magnetic Sensing Unit) and how often does it need to be programmed?
Replaces the flux valve
5 years
How is the MSU managed? (MAG/DG/SYNC)
Via MFD Bezel B Keys
What does the amber arc on the compass rose indicate when in DG?
The difference between DG and MAG heading
When does the Excessive pitch up and down indicators show?
+38
-28
What does TRU mean on the NI?
That the heading reference is set to True
Does MAG/TRU maintain the last selection on power up?
YES
Does the AHRS automatically switch to DG?
YES
When IVO magnetic disturbances
How is TRU HDG selected?
EDCU
Last setting retained
When is the Digital VSI readout removed?
<300fpm
Where can you select between TRUE & MAG?
EDCU
When do you get a PITCH or ROLL Miscompare?
> +/- 5deg >0.5s
When does a HDG Miscompare annunciate?
> 10deg >2sec
When does a VS miscompare annunciate?
> 200fpm >1s
What happens to the compass rose when HDG FAIL is annunciate?
Heading box - 3 white dashes, compass rose and graduations remain displayed
How long does ADAHRS take to align?
60 secs
What does ESIS stand for?
Electronic Standby Integrated System
What feeds the ESIS?
- EMER 1
- ADAHRU 1 (2 can be selected)
- NAV1 & NAV2
-WOW
Is the ESIS VNE dynamic?
NO - fixed
WHat happens to the ESIS ASI when IAS<20kts?
Reads 0
Can the FMS feed the ESIS?
No
What malfunction could an ATT and heading failure indicate?
ADAHRS 1 fail
How is NAV1 & 2 controlled?
By both AMMCs from EDCU via A429s
Which NAV is the ADF fitted to?
NAV2
(Rockwell Collins 4000)
What will show if the CRS is being controlled by the opposite seat?
Displayed in Grey
How can you change the CRS?
Primarily by the DCP
Secondarily via the PFD Bezel Keys (MENU 1/2, SET, - COURSE +)
What is displayed with a failure of the Glideslope or Localizer on the ILS display?
Yellow cross
Where are Markers shown during an ILS approach?
On the PFI of the PFD
When does LOC or GS miscompare happen?
> 0.75 dot >1s
Independent Position Determining is achieved by:
RADALT
TCAS
WXR
What are and where are the RADALT transceivers installed?
Rockwell Collins ALT-4000
The floor of the tailboom
How are the RADALTs Powered?
RADALT 1 - MAIN4
RADALT 2 - ESS1