Flight Controls

Question 1

When do the outboard ailerons lock on the 767?

Answer 1

At high speeds

Question 2

What does the AIL LOCK light indicate (767 only)?

Answer 2

The outboard ailerons have not locked at high speed
or
The outboard ailerons have not unlocked at low speed

Question 3

What are the conditions for Auto Speed Brake extension?

Answer 3

Anytime reverse thrust selected
and
At main gear touchdown - if armed

Question 4

What does the AUTO SPD BRK light (overhead panel) mean?

Answer 4

There is a fault in the auto speed brake system - they may deploy in flight or fail to deploy on the ground.

Question 5

Yaw Damper switches are normally left ON, when does the INOP light extinguish during ground ops?

Answer 5

When they have hydraulic pressure

Question 6

STAB TRIM light (overhead panel and EICAS message) means what?

Answer 6

Degraded stab trim system - runs at half rate

Question 7

UNSCHED STAB TRIM light (overhead panel) means what?

Answer 7

1) Uncommanded stab trim (runaway trim)
2) Trim in opposite direction of commanded
3) Using alternate stab trim with the autopilot engaged

Question 8

RUDDER RATIO light (overhead panel and EICAS message) means what?

Answer 8

Rudder ratio system has failed.

Question 9

What does the Rudder Ratio system do?

Answer 9

Reduces rudder movement as speed is increased. Depressurizes the left actuator and prevents full deflection with the remaining two actuators. (begins about 160 kts with full ratio reduction about 230 kts)