Automatic Flight Control System, page 04-10-1

Question 1

What does AFCS stand for?

Answer 1

Automatic Flight Control System

Question 2

What 4 things does the AFCS consist of?

Answer 2

4 flight control Computers
One flight control Panel
Aileron and elevator servos
Two liner actuators for the rudder (yaw damping)

Question 3

What does FCC stand for?

Answer 3

Flight Control Computers

Question 4

What does FCP stand for?

Answer 4

Flight Control Panel

Question 5

What does HSTCU stand for?

Answer 5

Horizontal Stabilizer Trim Control Unit

Question 6

Where does the FCC get its input?

Answer 6

From the pilot through the FCP

Question 7

The FCC provide output data to what 5 things

Answer 7

FCP/ FD on the PFD’s/ AP Servos (elevator/aileron)/ Yaw damp/ Pitch Trim HSTCU

Question 8

AFCS 1/2 use which FCC’s

Answer 8

AFCS 1 uses FCC 1A and 2A

AFCS 2 uses FCC 1B and 2B

Question 9

Can FCC 1A and 2A be active when FCC 1B and 2B are active?

Answer 9

No, only one pair can be active providing info to AFCS 1 or 2. The other FCC is in standby and must be manually selected

Question 10

Where is the AFCS selection knob located to Manually change the FCC in standby to active.

Answer 10

Bottom right hand corner of the reversionary panel

Question 11

Do the FCC receive AC or DC power

Answer 11

28V DC

Question 12

Where does the FCC 1A receive its power (think emergency situation)

Answer 12

BATT BUS

Question 13

Where does the FCC 2A receive its power (think used usually)

Answer 13

DC ESS BUS

Question 14

Where does the FCC 1B receive its power (think emergency situation)

Answer 14

BATT BUS

Question 15

Where does the FCC 2B get it power

Answer 15

DC BUSS 2

Question 16

What is the NOTE associated with FCC 2B

Answer 16

Not powered during EMER Power only conditions

Question 17

What do the lights on either side of the mode selection buttons (NAV, VS, FLC) indicate

Answer 17

FCC acknowledgement signals. Left side is FCC 1 A or B and Right side is FCC 2 A or B

Question 18

Do the indicator lights on the mode selection buttons provide representation of active or armed FD modes

Answer 18

No, they must be cross referenced with the flight mode annunciator on the PFD for current lateral and vertical mode status.

Question 19

What are the 6 ways to manually disengage the AP

Answer 19

1.) Stab switch 2.) AP engage button on the FCP 3.) AP DISC switch-bar 4.) TOGA button 5.) AFCS SEL to the other AFCS 6.) Yaw Damp DISC switch

Question 20

What are the 8 things that will automatically fail the AP

Answer 20

1. ) FCC detects a failure in any axis
2. ) Power is lost to the active FCC
3. ) Loss of either IRS
4. ) Dual yaw damp failure
5. ) Excessive pitch or bank (pitch +25 or -17) (bank 45)
6. ) Stick shaker (either)
7. ) Switching AFCS’s
8. ) 2 sec after red WINDSHEAR warning

Question 21

At what altitude does the 1/2 bank come on

Answer 21

31,600 feet MSL