700/900 Flight Controls Flashcards Preview

SkyWest CRJ Upgrade 2019 > 700/900 Flight Controls > Flashcards

Flashcards in 700/900 Flight Controls Deck (25):
1

Do the primary FCs have flutter dampers? Do the ailerons?

No
Yes

2

What is the SSCU? How many are there?

Spoiler stabilizer control unit
2 separate, redundant, independent systems

3

What does the SSCU control?

Multifunction spoilers
INBD/OTBD GLD panels
Horizontal stab trim
RTL

4

What is the RTL? What is it a function of on the ground? In the air?

Rudder Travel Limit, prevents over stressing of vertical stabilizer
WOW, airspeed, slat/flap position, engine state
Airspeed, flap ops, engine operation

5

What are the programmed limits of the RTL? How can you tell if it’s failed?

3-33 degrees
Variable/full travel limits of AFCS page: travel outside the goal posts

6

What does a RTL status msg mean? A caution msg?

Redundancy is gone
QRH directed, cannot respond to inputs

7

What are the secondary FCs? What is their primary purpose? Secondary?

Multifunction spoilers, horizontal stab indications, slats/flaps
1st: Assist in roll response @ low air speeds
2nd: act as flight spoilers

8

How many PCU do the MFS have? Which system runs the inboard? Outboard?

MFS have 1 PCU per panel
Inboard: HYD 3
Outboard: HYD 2

9

How is the HST controlled?

SSCU 1 and SSCU 2

10

What is the T/O range for the HST?

3.5-11.5 degrees

11

How is the SSCU tested?
Is it continuously monitored?

3 levels of auto testing:
CPOST, SPOST 1, SPOST 2
YES: C-BIT

12

What does SPOST 2 check?

Integrity of MFS/GRND SP/ HST/ RTL/ and prox sensors

13

Do the 7/9 have slats? The 2?

YES
NO

14

What replaces the torque tubes in the 7/9 flaps?

Flex shafts

15

Where are the leading edge slats? Are they anti-iced?

Leading edge of wing, 3 panels per wing
Yes, with bleed air

16

Which slat is the largest? Smallest?

INBRD slat largest
OUTBRD smallest

17

How many slat extensions are there? When are they used?

Two: 20/25
Flaps 1/8/20 = 20
Flaps 30/45 = 25

18

Which extends first, slats or flaps? Which retracts first?

Slats extend first
Flaps retract first

19

Are the slats linked together? What happens if an actuator breaks?

YES, mechanically
The adjacent flaps will drag the other slat into place

20

What happens if there is an asymmetric slat?

Slat brakes are applied to lock the slats into the failed position

21

What does the EMER FLAP switch provide? How much flap control do you have? Is there a speed restriction?

Limited flap selection if there is a mechanical failure
Slats 20 degrees
Flaps 20 degrees
EMER FLAP inhibited above 230 KIAS

22

How is airborne lift dumping accomplished?

2 MFS panels per wing

23

The MFS are powered by how many hydraulic systems?

2 : HYD 2 out HYD 3 in

24

Which flight condition does the RTL limit rudder travel?

in flight only

25

What flight control has flutter dampers?

Ailerons only