Flight Instruments

Question 1

What are the 3 scenarios that green dot will be removed from the PFD?

Answer 1

1. Loss of IAS
2. S/F Position Disagreement
3. Temporarily while S/F are transitioning

Question 2

Does the Green dot account for speed brake actuation or ice accretion?

Answer 2

No

Question 3

What system derives our groundspeed?

Answer 3

IRS

Question 4

What airspeed is coincident with the top of the Red on the Low Speed Awareness (LSA) Tape?

Answer 4

Vshaker (stick shaker activation)

Question 5

When does the Low Speed Awareness (LSA) Tape get removed?

Answer 5

1. Airspeed data invalid
2. AoA data invalid

Question 6

What speed does airspeed begin being displayed?

Answer 6

30 kts

Question 7

When is vertical speed displayed and removed?

Answer 7

Displayed: increases above +550 fpm or below -550 fpm
Removed: < +500 fpm or > -500 fpm

Question 8

When does the green hashed box display on the altitude readout box?

Answer 8

below 10,000

Question 9

When does the miscompare annunciations come on for:
Airspeed
Heading
Altitude
Attitude
FPA
Roll
LOC

Answer 9

Airspeed = > 5 kts
Heading = > 6º
Pitch = > 5º
Roll = > 6º
FPA = > 2º
Altitude = > 200 ft
LOC = > 1/2 dot

Question 10

What does the HSI button do on the Display Controller Panel?

Answer 10

It switches between full compass, arc or map mode for the on-side PFD

Question 11

What are the 3 basic components in the 5 ADS?

Answer 11

1. ADSPs
2. TAT Probes
3. ADAs (Air Data Applications)

Question 12

How many ADSPs are there?

Answer 12

4

Question 13

How is AoA calculated on the 175?

Answer 13

The angle of attack is calculated based on an interface between the static pressure of the smart probes

Question 14

What are the components of an ADSP?

Answer 14

Each ADSP has:
1. MFP or multi-function probe (pitot-tube)
2. TAT probe that connects into ADC
3. ADC

Question 15

What is the range for RA usage?

Answer 15

-10’ to 2500’ RA

Question 16

How is AoA measured?

Answer 16

AoA is measured by taking the difference of static pressure readings from a static hole on the top and a static hole on the bottom of the MFP (multi-function probe)

Question 17

Each MFP has what?

Answer 17

1. 2 static ports
2. 2 total pressure ports
3. 2 drain holes

Question 18

What buses are the RAs on?

Answer 18

RA 1 = DC Bus 1
RA 2 = DC Bus 2

Question 19

Can IRS alignment be accomplished in flight?

Answer 19

Yes, by using GPS data

Question 20

What GPS is the baseline GPS and where are both GPS units located?

Answer 20

GPS 1 is the baseline GPS on MAU 1 (fwd e-bay)
GPS 2 is on MAU 3 (mid e-bay)

Question 21

Where are the transponders (TDRs) located?

Answer 21

Inside the 2 Modular Radio Cabinets