AFCS

Question 1

AFCS is comprised of how many systems, and what are they?

Answer 1

5

SAS, Trim, FPS, Flight Director, Stabilator system

Question 2

What is the Inner loop?

Answer 2

(SAS) is fast in response

Question 3

What is the outer loop?

Answer 3

(Trim/FPS) responds slower, driving flight controls

Question 4

Where are the stab amps now?

Answer 4

In the no. 1 and 2 FCCs

Question 5

Where are the FCCs located?

Answer 5

No 1 in the transition avionics compartment. No 2 in the nose compartment.

Question 6

AFCS: How many accelerometers are there?

Answer 6

2 lateral, 2 longitudinal, 1 vertical

Question 7

Are the trim actuators interchangeable?

Answer 7

No, they have different slip clutches.

Question 8

Stabilator: What does the limit switches do?

Answer 8

Prevent the stabilator from making contact with the fuselage.

Question 9

how many Air Data Computers (ADCs) do we have in the aircraft?

Answer 9

3

Question 10

What does lateral movement of the collective trim beeper do, below 50 knots?

Answer 10

The helicopter will do a pedal turn

Question 11

What does lateral movement of the collective trim beeper do, above 50 knots?

Answer 11

The helicopter will do a standard rate turn

Question 12

What “axis” do trim work in?

Answer 12

Collective, pitch, roll , yaw

Question 13

What “axis” do SAS work in?

Answer 13

Pitch, roll, yaw

Question 14

What component senses the aircrafts veritical acceleration?

Answer 14

The vertical accelerometer

Question 15

How can you get a SAS DEGRADED advisory?

Answer 15

turn off on of the SAS switches, or if the SAS computer detects a fault within the system.

Question 16

How can you get a SAS OFF caution?

Answer 16

Turn off both SAS or if you lose pressure at the SAS actuators.

Question 17

Can you get a TRIM FAIL caution on its own?

Answer 17

No.

Question 18

What is the force required to break through the clutch for the collective?

Answer 18

22 pounds

Question 19

What is the force required to break through the clutch for yaw?

Answer 19

80 pounds

Question 20

What is the force required to break through the clutch for roll?

Answer 20

13 pounds

Question 21

Can FPS move the collective trim?

Answer 21

No, only the Flight Director can move the yaw.

Question 22

What can the Flight Director move?

Answer 22

Collective, pitch and roll.

Question 23

Can you get both the FLT DIR FAIL and the FD COUPLE FAIL lights at the same time?

Answer 23

Yes

Question 24

On the UH60M, AFCS __________ have been replaced with _______________.

Answer 24

Rate Gyros, EGIs, lateral, longitudinal and vertical accelerometers.

Question 25

The FCCs, through FCC 2, provide FPS command signals to the pitch, roll and yaw trim actuators which in turn reposition the flight controls for __________ & __________ attitude hold and also ________ hold in yaw.

Answer 25

Pitch, roll, heading

Question 26

The stabilator system utilizes airspeed signals that originates from where?

Answer 26

ADCs (Air Data Computers)

Question 27

The stabilator system utilizes pitch rate signals that originate from where?

Answer 27

EGIs

Question 28

What provides a visual Vne indication?

Answer 28

Vne red arc

Question 29

The stabilator test can only be performed when the helicopter is??

Answer 29

On the ground with Nr

Question 30

What results in a STAB MANUAL MODE caution?

Answer 30

An ADC miscompare or loss of the airspeed signal.

Question 31

What results in STAB DEGRADED?

Answer 31

Loss of CLP from CLAP.