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Flashcards in Air Data System (ADS) Deck (18):
0

What is the purpose of the ADS?

Converts air pressures into digital format.

1

What data does the ADS use

Altitude (Barometric)
Vertical Speed
Indicated air speed (IAS)
True air speed (TAS)
Outside air Temperature (OAT)

2

Where is the DADU?

Right hand nose bay.

3

Where is the data output to?

AHRS
AFCS
AMS
CDS
CIV NAV
IAIS (not used)

4

What data is the DADU supplied with?

Pitot pressure
Static pressure
OAT

5

Where is the OAT probe?

Bottom left side of the fuselage.

6

What length is the probe cable?

Fixed length of known resistance.

7

Where is the ADU FLT/TEST switch?

KJA

8

What ensures the TEST switch cant be left in TEST?

Spring loaded switch.

9

What happens when you operate the TEST switch?

Voltage sent to AFCS that acts as test height for bar alt height hold testing. (50 ft)
Voltage sent to the CAC to simulate air speed testing the lateral accelerometers. (100 KTS)

10

Where are the outputs from the DADU displayed?

PFD

11

What indicators are displayed on the PFD?

Airspeed Indicator (ASI)
Barometric Altimeter (BarAlt)
OAT
Wind vector
Secondary output to VSI indicator

12

Where is the Air speed indicator on the PFD?

Top Left

13

What scale is used for the ASI?

Linear from 0 - 200 kt - 20kt intervals
Digital read out box in centre scale shown to nearest KT.
Red speed exceedance band 168kt +

14

Where is the barometric altimeter on the PFD?

Top right but can optionally be changed to bottom right.

15

What is the OAT probe made of?

Platinum

16

When is the FLT/TEST switch inhibited?

When BAR ALT is engaged

17

At what speed will you exceed VNO (velocity normal operating)?

164 KTS