Secondary Flight Controls

Question 1

How many trailing edge flaps

Answer 1

Two

Inboard and outboard

Question 2

How many leading edge slats

Answer 2

Seven

One inboard
Six outboard

Question 3

What is the Krueger flap purpose

Answer 3

seal between inboard slats and engine nacelle

Question 4

When are flaps inhibited

Answer 4

Above 20,000ft or greater than 275 knots

Question 5

What EICAS displays when flap handle is out of UP when flaps are inhibited

Answer 5

LOAD RELEIF

Question 6

What happens when flaps are selected to the ONE position

Answer 6

Slats move to the mid range postion

Question 7

When will slats move to the full position

Answer 7

Flap position 25 or more

Question 8

When slats are commanded to any position they move after flap movement

Answer 8

FALSE

Question 9

Modes of operation for secondary controls

Answer 9

Primary, Secondary, Alternate

Question 10

What modes do flaps operate independent of slats

Answer 10

Primary and Secondary

Question 11

How are flaps actuated in the PRIMARY mode

Answer 11

Center Hydraulic system

Question 12

How are flaps actuated in the Secondary and Alternate modes

Answer 12

Electrically from the left and right AC buses

Question 13

How is secondary mode selected

Answer 13

Automatically

Question 14

How is alternate mode selected

Answer 14

Alternate flaps ARM switch

Question 15

In secondary mode are slats extended to the mid position

Answer 15

No, unless airspeed exceeds 256kts.

Question 16

When is flap extension and retraction in the secondary mode inhibited

Answer 16

• Less than 40kts
• Center hydraulic system pressure is low
  two of the following are true
• Left engine N2 less than 50%
• Right engine N2 less than 50%
• Primary external power is available

Question 17

How do flaps and slats extend in the alternate mode

Answer 17

Simultaneously

Question 18

How do flaps and slats retract in the alternate mode

Answer 18

Slats inhibited until flaps are up

Question 19

Maximum flap and slat extension in alternate mode

Answer 19

Mid range slats and 20 flap

Question 20

What flap positions allow load relief

Answer 20

15 through 30 in primary only

Question 21

When are auto slats available

Answer 21

1 through 20 (Anytime slats are in the mid position)

Question 22

What is the purpose of auto slats

Answer 22

Improve stall characteristics by extending to the full position.