flight controls Flashcards

1
Q

what are the primary flight controls?

A

ailerons and multi function roll spoilers
elevators
rudder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are the secondary flight controls?

A

horizontal stabilizer
flaps and slats
multi function spoilers - when used as speed brakes or ground spoilers
dedicated ground spoilers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what controls the respective flight controls?

A

hydraulic actuators - Power Control Units (PCUs)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how are the aileron’s controlled?

A

conventional control cables

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the only flight control that isn’t fly by wire?

A

ailerons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what’s the difference between normal mode and direct mode?

A

no higher level functions available in direct mode

Half speed of artificial feel - there’s a slight lag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are the higher level functions associated with pitch?

A

gain on airspeed
elevator thrust compensation
AOA limiting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the higher level functions associated with yaw?

A

yaw damper
turn coordination
gain on airspeed - as airspeed increases, rudder deflection decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are the two complementary parts associated with the primary flight controls?

A

Primary Actuator control electronics (P-ACE)
Flight Control Module (FCM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the fly by wire system composed of?

A

9 actuator control electronics
four flight control modules
3 primary -ACE (controls rudder and elevator - 2 channels (1 active, 1 standby), 3 PACE units - 2 fwd ebay, 1 aft ebay)
2 slat/flap ACE (one channel for slats and one for flaps - middle ebay)
one horizontal stabilizer ACE (aft ebay 2 channels, one standby, one active)
3 spoiler ACE - (inside FCM - FCM 1,3,4 control each individual spoiler)
4 FCM’s - (provide digital inputs to PACE, combined with pilot inputs - provides higher level functions)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the priority for the trim system?

A

back up
captain
first officer
auto pilot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how is roll controlled?

A

ailerons and multi-function spoilers (outer 3 spoilers on each wing)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how many spoilers are on each wing? what are their functions?

A

5
3 outboard multi-function spoilers are used to assist in roll control, as speed brakes and as ground spoilers.
2 inboard spoilers are only used as ground spoilers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

when will speed brakes automatically close even if the lever shows deployed?

A

slats/flaps selected to 2 or greater
airspeed < 180 kts
TLA > 70 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

when is the electronic Power up built in test performed? how long does it take?

A

during power up after the airplane is powered by any AC source - takes 3 minutes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

when is the hydraulic PBIT test performed? how long does it take?

A

on the ground when 3 hydraulic systems are pressurized
1 minute

17
Q

what is the flap/slat extension/retraction sequence?

A

slats extend first
flaps retract first

18
Q

will loss of airspeed data cause the flight controls to go into DIRECT mode?

A

yes

19
Q

if you’re in direct mode, do you have ground spoilers?

A

no

20
Q

Can FCM override pilot input?

A

no, pilot always have ultimate control

21
Q

what happens to artificial feel if flight controls are disconnected?

A

artificial feel is felt as 1/2 the normal load

22
Q

how are the flight controls trimmed?

A

roll and yaw
ailerons and rudder surface repositioned to a new ‘neutral position’
Pitch
Horizontal stabilizer

23
Q

will the multi-function spoilers function in DIRECT mode?

A

yes for roll only and at a default fixed gain. ground spoilers won’t deploy on landing

24
Q

will the speed brakes/ ground spoilers function in DIRECT mode

A

no

25
Q

what happens to the flight control system when the RAT is the only AC power source?

A

Horizontal stab trim operates at LO SPEED
Slat/flap system operates at LO SPEED
Slat/flap position is limited to ‘3’ to allow adequate airspeed for the RAT.

26
Q

what are the higher level functions? (8)

A

elevator control laws scheduling with airspeed

auto-thrust compensation with elevator

AOA limiting with elevator offset

rudder airspeed gain scheduling and stroke limiting

Yaw damper and turn coordination via AFCS
(automatic flight control system)

Rudder flight authority

Roll spoiler scheduling with airspeed and speed brake deployment

configuration change compensation with horizontal stabilizer due to speed brakes actuation

27
Q

what kind of flaps do we have?

A

double slotted flaps