Flight Control System

Question 1

MMO limit with mach trim inop

Answer 1

.77 Mi

Question 2

How is roll control achieved?

Answer 2

Using manual ailerons and HYD fly by wire roll spoilers.

Question 3

In the event of an aileron jam how can roll control be regained?

Answer 3

Aileron disconnect handle on pilots yoke.

Question 4

If aileron disconnect is pulled how is roll controlled?

Answer 4

The pilots yoke is disconnected from the mechanical aileron linkage. 2 RVDTs detect yoke position and transmit it to each FCECU. the FCECU command the position of their respective multifunction spoiler causing the aircraft to roll left or right.

Question 5

How is the rudder controlled?

Answer 5

Rudder input is digitally transmitted to the FCECUs by the rudder feel trim unit. FCECUs then send commands to two electro hydraulic servo actuators which position the rudder.

Question 6

How is the rudder trimmed?

Answer 6

Rudder trim switch on center console sends signal to FCECUs.

Question 7

Once disconnected, if the pilot’s elevator control is found to be operative, what is not available?

Answer 7

The stick pusher, autopilot pitch control, and Q-feel.

Question 8

Max flap speeds?

Answer 8

10 - 250
20 - 220
LND - 180

Question 9

Max alt for flaps extended?

Answer 9

20,000 ft

Question 10

Limitations for yaw damp failed?

Answer 10

250 kts / 25,000 ft

Question 11

Limitations for mach trim inop?

Answer 11

340 kts / .77 Mi