Flight Controls

Question 1

What powers the primary flight controls?

Answer 1

All three HYD Systems provide redundant power for the primary flight controls.

Question 2

What powers the secondary flight controls?

Answer 2

At least two HYD Systems provide redundant power for the secondary flight controls.

Question 3

How are the CA and FO flight controls attached?

Answer 3

The yokes are connected through jam override mechanisms that can be broken by sufficient force. Some control effectiveness will be lost. The rudders are rigidly connected.

Question 4

What powers the horizontal stabilizer?

Answer 4

The left and center hydraulic system, through two stabilizer control modules.

Question 5

Describe the three stabilizer control modes.

Answer 5

Electric - Control Yoke, two motors, full rate, 1.5 unit range.
Alternate - switches on the control stand; greater range.
Automatic - Autopilot controlled, one motor, half rate.

Question 6

Will Stabilizer Trim change autopilot actuation?

Answer 6

• Electric trim will disengage one autopilot, but is inhibited with more than one autopilot engaged.
• Alternate trim “neutralizes” any other conflicting input, and does not cause disengagement.

Question 7

UNSCHED STAB TRIM

Answer 7

• uncommanded stab motion.

- alternate trim with autopilot engagement.

Question 8

How can you stop trim movement?

Answer 8

• stabilizer cutout switches.

- opposite control column displacement interrupts trim.

Question 9

STAB TRIM

Answer 9

• 1/2 rate movement, for whatever reason (1 or 2 motors offline).
• FAULT
• If unique to ELEC Trim, full rate still possible with ALT.

Question 10

Why do we use the Center Autopilot?

Answer 10

• The the Center Autopilot can use both the L and R Trim Motors.
• 762s FCCs can only control the FD or the AutoPilot, but not both. Normal ops: L & R FCCs control FDs, and and C FCC controls Autopilot.

Question 11

What is the only CAUTION Light on the Overhead Panel?

Answer 11

UNSCHED STAB TRIM

Question 12

What is the PES?

Answer 12

• Pitch Enhancement System.
• Hydraulic motor (PTU) powered by the R System to power trapped fluid in the L System.
• Automatic if both L and C HYD Systems fail.
• Only powers Electric Trim on the yoke at 1/4 Rate.

Question 13

How is Roll Controlled?

Answer 13

• Yokes connected so that significant pressure will disconnect the two, for proportional displacement of ailerons/spoilers, and to require more force with more displacement.
• Aileron trim controlled with dual aft aisle stand switches using HYD power from any one of the three systems.

Question 14

Describe the aileron lockout system.

Answer 14

• Prevents over control at high altitudes and high speeds by inhibiting outboard ailerons.
• AIL LOCK means actuator disagrees with commanded position. At high altitudes and airspeeds, it may mean that one or both ailerons failed to lock, and at low altitudes and speeds, that one or both failed to unlock.

Question 15

How many Yaw Dampers are there?

Answer 15

Two. They operate through the rudder control system, with information from the IRUs. They help with turn coordination, and they protect against uncommanded yaw forces.

Question 16

How is rudder movement controlled?

Answer 16

The Rudder Ratio Changer modifies displacement, in relation to pedal inputs, based on ADC inputs (airspeed - 160). It uses an actuator powered by the Left HYD System.

Question 17

What happens with a RUDDER RATIO light?

Answer 17

• Rudder Ratio System FAIL; L Actuator automatically disconnected; avoid large inputs above 160.
• L Actuator FAIL; Reduced authority at low airspeeds; 15 Knots X-Wind Limit, and No AutoLand.

Question 18

What system powers the FLAPS?

Answer 18

Center HYD.

Question 19

How are the Spoilers used?

Answer 19

• Symmetrically, on the Ground and in the Air, to Reduce Lift and Increase Drag
• Asymmetrically, for increased roll authority.

Question 20

Describe Speedbrake Operation.

Answer 20

ARMED - When gear not tilted, & Thrust Levers Idle - Spoilers all up.
TR - On the ground, positioning either TR in the detent will extend the Spoilers, whether armed, or not.
Speed Brakes - lever can be placed in any position to partially extend spoilers, as needed.

Question 21

SPEEDBRAKES

Answer 21

When extended below 800’ RA

Question 22

AUTO SPDBRK

Answer 22

• FAULT
• Lever to Down, because you don’t know when they will/won’t extend.
• You can still use manually.

Question 23

SPOILERS

Answer 23

• one or more spoiler pairs are inoperative.

Question 24

Flap and Slat Operation

Answer 24

• Increase lift/drag for TO/LNDG
• Indicated by two pointers, normally L covers R.
• Flaps 1 - Only the LE Slats Move.
• TO - (Flaps 1) / Flaps 5, 15, and 20
• LNDG - Flaps 20 (Abnormal), 25 and 30

Question 25

Command and Positions

Answer 25

- Flaps 1 - 20 - Slats 1/2 Position - Flaps 5 - 20 - Flaps move accordingly. inbrd ails droop. (ARM the Flap Load Relief System at 20) - Flaps 25 - 30 - Slats Full, Flaps accordingly.

Question 26

Flap Load Relief

Answer 26

- When in 25 or 30, flaps automatically retract to 20 when oversped. They move back to 25 or 30 when airspeed is reduced.

Question 27

What happens if you loose C HYD Pressure?

Answer 27

- Alternate Flap Mode! Extension accomplished electrically. - Alternate Gear Extension - hopefully you can still brake and steer on ground

Question 28

What do the Alternate Flap Switches do?

Answer 28

1. Allow independent selection of flaps and slats. 2. Disable the normal control. 3. Arm the alternate mode. 4. Engage the Electric Motors. 5. Disable the Flap Lever.

Question 29

What are Alternate Flap Extension Limitations?

Answer 29

1. Flaps 20. (Procedurally, for possible GA) 2. No Load Relief 3. TE Flap Asymmetry Protection not available. 4. Slow as Fuck. (156 Seconds vs. 26 Seconds)

Question 30

LEADING EDGE light

Answer 30

- Disagreement between selected and actual position - Lever not in detent. - Asymmetry - HYD Power automatically shut off (to slats)

Question 31

TRAILING EDGE light

Answer 31

- Position Disagreement. - Lever not in detent. - Asymmetry - HYD Power to Flaps automatically shut off. - Load Relief FAILs to work properly

Question 32

What are the three times you will get an UNSHED STAB TRIM.

Answer 32

1. Trim with the A/P 2. Uncommanded trim movement. 3. Movement of the STAB in the wrong direction.

Question 33

What logic automatically extends spoilers on a RTO?

Answer 33

TRs?

Question 34

Speed brake limitations.

Answer 34

- Not below 800' | - Not for Flaps greater than 20.

Question 35

AUTO SPD BRK light.

Answer 35

- FAULT. - May not have SPD Brakes on Landing. - If armed, they may extend before you're on the ground.