Flight Controls Flashcards

1
Q

Primary flight controls are:

A

Ailerons, elevators, rudder

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

Secondary flight controls are:

A

MFS (Multi function spoilers), Slats/Flaps, trim

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

One ___ exists for every hydraulic system that power the flight control surface.

A

PCU

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

Following a complete hydraulic failure, what controls will still be available?

A

Slats/Flaps and stab trim

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

Which hydraulic system powers the inboard MFS (multi function spoilers) panels and how many PCU’s exist per panel?

A

HYD System 2

One PCU per panel

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

Which hydraulic system powers the outboard MFS panels and how many PCUs exist per panel?

A

HYD System 1

One PCU per panel

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

How are flaps/slats powered?

A

Electrically

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

Which flight control PCUs are actuated through direct linkage?

A

Elevator, Ailerons, Rudder use cable/pully system.

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

Which flight control PCUs are actuated through Fly-by-wire commands?

A

MFS

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

What is a PCU and what does it do?

A

Power Control Unit; hydraulically actuates flight control surfaces

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

Does a PCU require hydraulic power to actuate flight controls?

A

Yes

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

Why is there not a PCU runaway procedure for elevator or rudder?

A

The other PCUs will over power the failed PCU

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

From the pilot’s perspective, what will be different with an aileron jam than a PCU runaway?

A

Jam may not be noticed right away, controls are sluggish.

PCU runaway will be an uncommanded roll.

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

How can you isolate a jammed aileron/elevator

A

The roll or pitch disconnect handle will use the torsion tube disconnect.

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

What will occur 20 seconds after pulling the ROLL DISC handle?

A

SSCU (spoiler stabilizer control unit) illuminates both ROLL SEL lights on dash panels. Caution message will appear.

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

What occurs after pressing the PLT ROLL Switchlight?

A

Connects onside MFS to the side selected. (Previously only had opposite side MFS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

If you should inadvertently disconnect the ailerons/elevators in flight can they be reconnected?

18
Q

Does moving the control column move the horizontal stabilizer?

A

No, moved by stab trim

19
Q

When does the airplane automatically apply stabilizer trim?

A

When flaps are changed from 0-20 or 20-0 when hand flying it will use auto and mach trim.

20
Q

What is the stabilizer trim priority?

A

CA, FO, Autopilot, Auto Trim, Auto Mach

21
Q

How many PDUs (power drive units) exist for the flaps?

A

1 for flap (also 1 for slats)

22
Q

What does the status message FLAPS HALFSPEED mean?

A

One channel or motor of SFECU (slat flap electronic control unit) is inop. Flaps still activate just at reduced speed.

23
Q

What would result from an asymmetrical flap deployment/retraction?

A

FLAP FAIL caution message. Brake position sensor will stop movement when 5 degree difference or more is detected.

24
Q

What type of flaps are on the CRJ?

A

Double slotted flaps

25
How many PDUs for the flaps?
2 PDUs
26
Audio clacker will sound when trim is engaged for more than __ seconds.
3 seconds
27
_____ prevents damage to ailerons when hydraulic pressure is not on or lost. This function is automatically built into the PCUs for the elevator.
Flutter damper
28
How many SSCU's are there (Spoiler stabilizer control unit)
2
29
What senses slat/flap position?
BPSU (Brake position sensor unit) uses transmitters to stop slat movement when correct position is obtained.
30
What does it mean when flap position indicator is white?
Difference between L and R flap is 5 degrees or greater. Flaps are misconfigured.
31
What occurs when you move the EMER FLAP switch to the DEPLOY position?
Lowers slats/flaps to 25/20 on the CRJ-700 or 20/20 on the CRJ-900. SFECU will not allow flap overspeed. Can be reset to normal position if needed.
32
List all of the functions of the MFS (Multi function spoilers):
Roll augmentation at low speeds, flight spoilers to slow down, ground lift dump.
33
Which spoilers are the MFS (Multi function spoilers)?
2 OB are multifunction 2 IB are ground
34
What is the logic for when the ground spoilers will deploy on touchdown vs when the MFS spoilers will deploy on touchdown?
Multi function assist in roll control with crosswind landings and will not deploy right away.
35
What are the stall warnings/indications you would receive?
1. Continuous ignition on 2. Stick shaker + AP disconnect 3. Aural warbler, red stall switchlight, stick pusher
36
Difference between FLT SPLR DEPLOY caution message and FLT SPLR DEPLOY advisory message?
Caution: when less than 300' RA and in climb detent Advisory: Greater than 300' RA and below climb detent
37
What is the company limit on spoiler use?
1000' AGL
38
At rotation the stick pusher malfunctions and inadvertently pushes, what would you do?
Hold AP/SP Disconnect button on yoke and if needed turn off STALL PTCT switch on either side.
39
What does the BUTE door do?
Bent Up Trailing Edge: directs air flow over leading edge vane during flap extension
40
How do you tell the difference between an inadvertent sick pusher and a nose down stab trim runaway?
Trim runaway clacker activates after 3 seconds. Stick pusher will be abrupt.