DAFCS

Question 1

Define DAFCS

Answer 1

Digital advanced flight control system

Question 2

How do you momentarily disengage altitude hold when changing altitude?

Answer 2

Thrust brake switch

Question 3

When flying in known or forecast moderate or above turbulence, what are the three concerns/restrictions the pilot should be aware of?

Answer 3

LCT’s must be in manual, operating thrust break, do not use barometric altitude hold

Question 4

Will the cyclic move when the DAFCS trim switch is moved laterally?

Answer 4

No

Question 5

Which actuator makes the control input for positive stick gradient, pitch attitude, and airspeed hold purposes?

Answer 5

DASH- differential airspeed hold

Question 6

Will the LCTs function with the DAFCS switch in the off position?

Answer 6

Yes

Question 7

What is the name of the DAFCS component which the #1 FCC controls to provide the altitude hold feature?

Answer 7

Thrust CCDA

Question 8

Which DAFCS computer controls the radar and inertial altitude hold feature?

Answer 8

FCC #1

Question 9

What two features of DAFCS disengages when the centering device release sw is pressed?

Answer 9

Bank angle hold, heading hold

Question 10

What are the three control laws (regimes)?

Answer 10

Forward flight, low speed, ground regime

Question 11

What is the maximum aircraft bank angle with altitude hold engaged?

Answer 11

45° 

Question 12

What must be monitored to prevent transmission damage when changing Airspeed or heading with altitude hold engaged?

Answer 12

TQ, thrust control inputs

Question 13

Which fight control computer (FCC) controls the pitch CCDA?

Answer 13

2 FCC

Question 14

If you have a hard over with both DAFCS on how will you know when you have the good system selected on and the malfunctioning system off?

Answer 14

Erroneous inputs to flight controls will continue until The healthy system is selected

Question 15

How will the aircraft react if the AFCS is turned off at one air speed and back on at a different airspeed?

Answer 15

Pitch transients

Possible DASH 1/2 failure as it reprograms/adjusts

Question 16

What visual indication will you see when the DASH actuators are re-centering when AFCS is first turned on?

Answer 16

DASH1 and/or DASH2 FAIL caution

Question 17

Define CPT

Answer 17

Control position transducer

Question 18

Define LVDT

Answer 18

Linear variable differential transducer

Question 19

What portion of the ILCA’s are controlled by the DAFCS flight control computers?

Answer 19

Extensible links portion

Question 20

How accurate is the DAFCS heading hold feature?

Answer 20

+/-5°

Question 21

When the landing gear proximity switches are activated, the DAFCS input into the pitch ILCA is reduced by what percent?

Answer 21

50%

Question 22

What 3 DAFCS features are provided by the DASH actuator?

Answer 22

Airspeed stability, pitch attitude stability, positive cyclic stick gradient

Question 23

Which flight control computer (FCC) controls the thrust CCDA?

Answer 23

1FCC

Question 24

At what groundspeed does the position hold feature become active or captured?

Answer 24

Below 1KGS

Question 25

Is go around a DAFCS feature or a feature of the flight director?

Answer 25

Flight Director

Question 26

When can radar altitude hold be used in forward flight?

Answer 26

Overwater or smooth terrain

Question 27

Does the cyclic have to be centered for the cyclic to be in detent?

Answer 27

No

Question 28

At what airspeeds (accelerating and decelerating) is the low speed regime active?

Answer 28

Aircraft has not Accelerated past 45 KCAS
-or-
Aircraft decelerates below 35 KCAS

Question 29

Above what airspeed can LEVEL (Roll Wings Level Mode) be activated?

Answer 29

45 knots

Question 30

Under what 2 conditions will ALT-RAD automatically switch to ALTINRT?

Answer 30

The aircraft climbs above 8000’ AGL or the radar altimeter fails for more than 2 seconds

Question 31

Held presses of the UP/DOWN sw on the Thrust Control Grip commands an altitude change rate of what?

Answer 31

200 ft/min (3.33 ft/sec)

Question 32

ALT-INRT may allow the aircraft to drift above or below the reference altitude at a rate of _______ /min or ______ /min when GPS aiding is off without any corresponding annunciation.

Answer 32

5 ft per minute
-or-
15 feet per minute

Question 33

How does DAFCS provide torque limiting for DAFCS altitude hold and vertical axis coupled modes to prevent overtorque, exceeding engine limitations and to prevent rotor droop?

Answer 33

-maintains dual engine torque below 96%
-maintains the higher of the two engines below 10 minute limit (899 • Celsius)
-keeps dual engine torque above 14% to prevent spray clutch disengagement

torque limiting will not lower the thrust if radar altitude is less than 100’ AGL

Question 34

DESCENT mode will descend the aircraft at approximately ___ degrees and rates of descent no more than approximately _____ fpm until termination at a hover flight condition at a minimum height of ___ feet AGL.

Answer 34

9 degrees

600 fpm

20 feet AGL

Question 35

At gross weights above 42,400lbs with BALT mode engaged, bank angles greater than ___degrees results in large uncommanded pitch attitude and airspeed deviations.

Answer 35

22 degrees

At night or in IMC flight, this may cause the pilot to become spatially disoriented

Question 36

DECEL can be armed at any speed but will be activated only below _____ knots ground speed and remain active up to ____knots ground speed.

Answer 36

65 knots ground

70 knots ground