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ATLAS B744 > FLIGHT CONTROLS > Flashcards

FLIGHT CONTROLS Flashcards

1
Q

Describe the function of the Stabilizer (STAB) Trim Cutout Switches, AUTO position?

A

• Supplies hydraulic power for stabilizer trim
• Shuts off related system hydraulic power if unscheduled trim
detected.
FCOM, VOL 2; 9.10.2

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2
Q

What surface component is moved when stabilizer trim inputs are made?

A

• Leading edge of the movable horizontal stabilizer
• Stabilizer trim varies the angle of incidence of the horizontal stabilizer.
FCOM, VOL 2; 9.20.3

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3
Q

State what occurs when the Stabilizer Trim CUTOUT Switches are in CUTOUT?

A

• Shuts off related hydraulic power to stabilizer trim.

FCOM, VOL 2; 9.10.2

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4
Q

Describe the function of the alternate trim switches?

A

• The switches provide trim commands through a separate control
channel.
• The switches provide an increased range of stabilizer trim travel.

FCOM VOL 2; 9.20.4

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5
Q

How do the FMCs calculate correct stabilizer trim greenband?

A

• The FMC’s use the calculated gross weight,
• Centre of gravity, and
• The takeoff thrust derate selection.
- position of the nose gear oleo pressure switch is compared to calculated
green band as a cross check.

FCOM, VOL 2; 9.20.4

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6
Q

How does the aircraft provide a crosscheck to ensure the correct greenband has been selected?

A

• A nose gear oleo pressure switch position is compared to the selected greenband.

FCOM, VOL 2; 9.20.4

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7
Q

What is the effect on stabilizer trim if the control wheel stabilizer trim switches are used while the autopilot is engaged?

A

• If a single autopilot is engaged, the autopilot will disengage and the stabilizer
trim will move in the desired direction.
• If multiple autopilots are engaged, the control wheel stabilizer trim switches
are inhibited.

FCOM, VOL 2; 9.20.5

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8
Q

State the effect on the autopilots and stabilizer trim, if the alternate trim switches are used with any number of autopilots engaged?

A

• The alternate trim switches override autopilot trim commands with
any number of auto pilots engaged.
• The alternate trim switches do not cause autopilot
disengagement.

FCOM, VOL 2; 9.20.5

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9
Q

How many spoiler panels are provided?

A

• 6 spoiler panels on each upper wing

FCOM, VOL 2; 9.20.11

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10
Q

Which spoiler panel does not function as a flight spoiler?

A

• Inboard spoiler on each wing.

FCOM, VOL 2; 9.20.11

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11
Q

Which spoiler panels function as speedbrakes in flight?

A

• The four inboard panels on each wing.

FCOM, VOL 2; 9.20.11

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12
Q

Which spoiler panels function as ground spoilers when on the ground?

A

• All six spoiler panels on each wing.

FCOM, VOL 2; 9.20.11

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13
Q

Which spoiler panel is displayed on the EICAS status display?

A

• 4th spoiler panel in from the wingtip on the left wing.
(this panel functions as a flight spoiler, speedbrake, & gnd spoiler)
• the outermost panel on the right wing (flight spoiler and ground
spoiler only, and therefore, speedbrake extension is not displayed
on the right wing’s spoiler position indicator)

FCOM, VOL 2; 9.20.11

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14
Q

Which spoiler panels are extended with the speedbrake lever in the flight detent position?

A
  • The two inboard spoilers on each wing extend to mid-travel.
  • The two middle spoiler panels on each wing extend to full travel.FCOM, VOL 2; 9.20.11
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15
Q

When do the spoiler panels extend to the UP position during landing, if the speedbrake lever is ARMED?

A
  • Thrust levers 1 and 3 near idle, and
  • Main landing gear touch down.FCOM, VOL 2; 9.20.11
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16
Q

When do the spoiler panels extend to the UP position during landing if the speedbrake lever is NOT Armed?

A
  • Thrust levers 1 and 3 near idle, and
  • Main landing gear on the ground, and
  • Reverse thrust levers 2 or 4 pulled up to the idle detentFCOM, VOL 2; 9.20.11
17
Q

Since the speedbrake lever is in the DN position during takeoff, what action provides an automatic spoiler function for RTO?

A
  • Main gear on the ground, and
  • Thrust levers 1 and 3 near idle, and
  • Reverse thrust levers 2 or 4 pulled to the idle detent.FCOM, VOL 2; 9.20.11
18
Q

For go-around protection, what action drives the speedbrake lever to the DN position?

A

• Thrust lever 1 or 3 advanced from the closed position,
regardless of whether ground spoilers were automatically
or mechanically selected.

FCOM, VOL 2; 9.20.11

19
Q

Which elevator panels are displayed on the Surface Position Indicator?

A

• Left and right outboard elevator positions.

FCOM, VOL 2; 9.10.13; 9.20.2

20
Q

What can you do if you lose elevator control due to a jam?

A

• When significant manual force is applied to the control column,
shear outs between the inboard and outboard elevators allow
elevator control to be regained.

FCOM, VOL 2; 9.20.2

21
Q

Describe the elevator feel system?

A

• Elevator feel and centering mechanism provides artificial feel in the
control column.
• Force increases as airspeed increases
• If both hydraulic systems 2 and 3 fail, mechanical springs provide
feel force. Feel force is no longer a function of airspeed.

FCOM, VOL 2; 9.20.2

22
Q

How does the aileron lockout system work, and what is its purpose?

A

• How it works: Locks the outboard ailerons in the neutral position
at airspeeds above 238kts.
• Purpose: Permits full travel of the outboard ailerons at low
airspeeds, and
• Prevents over-controlling at high airspeeds, and
• Provides the required roll authority at low airspeeds.

FCOM, VOL 2; 9.20.7

23
Q

What would happen if you use aileron trim with the autopilot engaged?

A

• The aileron neutral point is repositioned, by the feel and trim mechanism.
• When the autopilot is disengaged, the wheel and ailerons move to the
repositioned aileron neutral point.
• The airplane responds with roll proportional to the amount of aileron
trim input.

FCOM, VOL 2; 9.20.7

24
Q

How do the rudder ratio changers work?

A

• Rudder ratio changers gradually reduce each rudder surface’s
response to pedal inputs as airspeed increases.
• The system protects the vertical tail from stresses caused by large
rudder surface deflections at high airspeeds.

FCOM, VOL 2; 9.20.9

25
Q

What is the purpose of the yaw dampers?

A
  • To improve airplane lateral and directional stability, and
  • To provide turn coordination.FCOM, VOL 2; 9.20.10
26
Q

YAW DAMPER ON/ INOP switch positions?

A 
ON
- Yaw damper is powered.
INOP light illuminated.
- Yaw damper switch is off, 
- Yaw damper is in operative, or
- IRU’s still in alignment mode.
  Remains illuminated until the first IRU is aligned.

ATLAS B744 (21 decks)

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