Avionics

Question 1

Whats is the NORMAL heading source for each DBDI in flight

Answer 1

The on side IRS

Question 2

Whats is the BACKUP heading source for each DBDI in flight

Answer 2

IRS #3 (Green “AHDG” indication on each DBDI

Question 3

What is indicated by a “999” in the speed window of the flight guidance panel

Answer 3

No valid auto-speed target is available

Question 4

What is the normal order of the FMS pre departure flow

Answer 4

NAV IDENT
POS INIT
FLT PLAN
PERF INIT
DEP
TAKEOFF INIT

Question 5

Where do the Data Acquisition Units (DAU) receive information

Answer 5

From the engine sensors

Misc aircraft systems such as fuel quantity

Question 6

What is the default power-up heading source for each DBDI

Answer 6

The flux valve(mag compass), indicated by an amber “STBY” on each DBDI

Question 7

When flying a “blue data” approach, what are the proper indications to show that the FMS is in approach mode?

Answer 7

• 2 miles prior to the FAF/FAWP, the “APRCH” light must be illuminated on the CDU
• The missed approach prompt SHOULD be displayed at the 4L position on the CDU flight plan page

Question 8

On a “blue data” app, what is indicated by the illumination of the APRCH light on the FMS

Answer 8

• FMS is the selected navigation source and the aircraft position is 2nm outside the FAF and the MAP on the FMS(4L)
• The FMS is using sensors approved for that type of approach
• A non-precision approach that is not localizer-based has been selected from the FMS

Question 9

Is it possible to have both the DGRAD and the APRCH lights on the CDU illuminated at the same time

Answer 9

No the Approach light will not be displayed if DGRAD has illuminated

Question 10

After takeoff, when are the takeoff V-speeds replaced by Vref on the airspeed tape

Answer 10

When accelerating above 200 knots and above 400 feet AGL

Question 11

What conditions might cause the performance computers to delete the takeoff V-speeds after they have been “boxed” for takeoff

Answer 11

Selecting DIRECT TO a waypoint on the ground

Question 12

What is the sensor priority for the FMS, from the highest to lowest

Answer 12

GPS
DME / DME
VOR / DME
IRS

Question 13

During takeoff when does the auto- throttle system go to “HOLD’ mode

Answer 13

At 60 knots IAS, regardless of PWR LVL position or EPR

Question 14

When are Flight Director command bars displayed on both PFDs

Answer 14

TO or GA mode
Dual approach mode active (ILS below 1,200AGL
2 failed symbol generators with the remaining one in NORM (two failed in ALT)

Question 15

What action is required with a flight guidance computer failure

Answer 15

NONE, the working FGC takes over automatically

Question 16

What is the indication with a failed fault warning computer (FWC)

Answer 16

A RED “X” in the CAS message portion of DU4 until the operative FWC is selected on the display controller SENSOR page