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REX - 737 Systems > Chapter 9 - Flight Controls > Flashcards

Chapter 9 - Flight Controls Flashcards

1
Q

Yaw damper inputs (main or standby) can be overridden:

A

By either trim or rudder pedal inputs.

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2
Q

If wheel spinup is not detected on landing with the speed brake armed, the flight spoilers will
deploy automatically:

A

When the air ground system senses the ground mode (when any strut compresses).

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3
Q

The number of slats located on each wing is:

A

4

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4
Q

When the standby yaw damper is active, rudder movements:

A

are not indicated on the yaw damper indicator.

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5
Q

With the loss of hydraulic system B, (system A operating normally) and after positioning the B FLT CONTROL switch to OFF or STBY RUDDER:

A

The YAW DAMPER switch disengages, the amber YAW DAMPER LIGHT illuminates and the YAW DAMPER switch cannot be reengaged

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6
Q

Conditions for speed trim operation include:

A

The autopilot not engaged

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7
Q

Main electric trim authority, for the 737- 800, is:

A

With flaps retracted 3.95 to 14.5 units.

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8
Q

Autopilot trim and stabilizer trim:

A

use the same electric motor.

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9
Q

In the event of a control column jam, an override mechanism allows:

A

The control columns to be physically separated.

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10
Q

How many flight spoilers are located on the upper surface of each wing?

A

Four

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11
Q

The trailing edge devices consist of: double slotted flaps inboard and outboard of each engine

A

double slotted flaps inboard and outboard of each engine.

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12
Q

The flap load relief system is operational at:

A

Flaps 30 and 40.

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13
Q

The flap/slat electronics unit (FSEU) provides:

A

a. LE skew detection for slats 2 through 7 except during autoslats operation.
b. TE asymmetry protection.
c. Uncommanded motion protection for LE devices or TE flaps.
d. All answers are correct.

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14
Q

The trailing edge flaps are at 15. The correct indication on the aft overhead panel for the
leading edge devices is:

A

All LE devices FULL EXT lights illuminated

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15
Q

During descent from altitude, you need to decrease your airspeed by using your speedbrakes.
What is the correct position for the SPEED BRAKE LEVER?

A

FLIGHT DETENT.

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16
Q

What is the maximum flap extension altitude?

A

20,000 feet

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17
Q

The ALTERNATE FLAPS master switch

A

Arms the ALTERNATE FLAPS position switch, activates the standby hydraulic pump,
and closes the trailing edge flaps bypass valve

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18
Q

The amber LE FLAPS TRANSIT light:

A

Is inhibited during autoslats operation in flight.

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19
Q

The autoslats system:

A

drives the slats to the full-extended position when the TE Flaps 1 through 5 are selected and the airplane approaches a stall

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20
Q

The Power Transfer Unit (PT U) provides an alternate source of power for the autoslats system if:

A

Loss of pressure is sensed from the higher volume system B engine-driven pump.

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21
Q

In addition to hydraulic system A and B, the rudder can also be powered by the standby hydraulic system through the:

A

Standby rudder power control unit

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22
Q

The elevator feel computer provides elevator system feel. This computer receives inputs of

A

Airspeed and stabilizer position.

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23
Q

The amber FEEL DIFF PRESS light illuminates when the:

A

TE flaps are up or down and an excessive differential pressure exists in the elevator feel computer

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24
Q

Select the correct statement:

A

a. The primary flight controls are powered by hydraulic systems A and B, with backup
from the standby hydraulic system for the rudder and manual reversion for the ailerons
and elevator.
b. Flight spoilers are used both for roll control, descent and deceleration.
c. The trailing edge flaps can be both extended and retracted using the alternate flap drive
system.
d. All statements are correct.

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25
Q

Loss of hydraulic system B pressure:

A

does not disengage the yaw damper switch.

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26
Q

When you place the ALTERNATE FLAPS position switch to the DOWN position:

A

fully extends the LE devices using standby hydraulic pressure and if held to the DOWN position, electrically extends the TE flaps until released.

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27
Q

The ALTERNATE FLAPS position switch is spring loaded to the OFF position:

A

from the DOWN position only

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28
Q

If you lose the B system pressure, will the YAW DAMPER switch move to the OFF position?

A

No. The switch stays in the on position until the B FLT CONTROL switch is placed to the STBY RUD

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29
Q

What is the function of the Yaw Damper?

A

a. Prevents dutch roll.
b. Dampens gusts.
c. Helps coordinate turns.
d. All of the answers are correct.

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30
Q

What causes the FEEL DIFF PRESS light to illuminate?

A

a. Excessive differential pressure in the elevator feel computer.
b. Failure of either hydraulic system (A or B).
c. Failure of either elevator feel pitot system.
d. All of the answers are correct

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31
Q

The speed trim system improves flight characteristics during operations with:

A

a. Low gross weight and aft centre of gravity.
b. High thrust.
c. Autopilot not engaged.
d. All the answers are correct.

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32
Q

Conditions for speed trim system are:

A

a. Airspeed between 100 KIAS and Mach 0.68.
b. 10 seconds after takeoff.
c. 5 seconds following release of the trim switches.
d. All of the answers are correct

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33
Q

Conditions for speed trim operations are:

A

a. N1 above 60%.
b. Autopilot not engaged.
c. Sensing of trim requirement.
d. All of the answers are correct.

34
Q

Mach trim system:

A

a. Provides stability at mach numbers above 0.615.
b. Adjusts the elevators with respect to the stabilizer as airspeed increases.
c. The Mach trim actuator repositions the elevator feel and centring unit, which adjusts the
control column neutral position.
d. All of the answers are correct.

35
Q

What flap settings are required for the auto slat to function?

A

a. 1, 2 or 5
b. 1, 5 or 15
c. 5, 15 or 30
d. any flap setting

36
Q

As the airplane approaches stall angle, the auto slat system causes the slats automatically to drive to the:

A

full extended position.

37
Q

System A pressure to the rudder PCU is reduced at what airspeed?

A

135 kts

38
Q

The number of ground spoilers on each wing is:

A

Two

39
Q

The flow to control the ailerons is as follows:

A
  • Either pilot rotates their control wheel
  • The cable from the Captains side provides the input through the Feel and Centering Mechanism to the aileron PCU’s
40
Q

Flight spoiler augmentation is activated:

A

When the control wheels are deflected more than 10 degrees.

41
Q

If the FO’s controls are jammed, the Captains control wheel will:

A

Operate normally with normal ailerons

42
Q

If the Captains controls are jammed, the Captains control wheel will:

A

Only aileron/spoiler mixing is available from the FO’s control wheel.

43
Q

With a dual hydraulic system failure, manual elevator control is provided by:

A

The cable drives from the control columns through the inoperative PCU’s.

44
Q

The feel system uses:

A

A or B system pressure, whichever is higher.

45
Q

Elevator Feel is provided by input from the:

A
  1. horizontal stabiliser position sensor
  2. airspeed probes on either side of the vertical stabiliser
  3. A & B hydraulic system
46
Q

Max speed with mach trim inoperative is:

A

280kts or .82M

47
Q

Horizonal stabiliser trim is available through:

A
  1. main electric trim
  2. autopilot trim
  3. manual trim
48
Q

The STAB OUT OF TRIM light indicates that:

A

The aircraft will not be in trim when the AP is disengaged.

49
Q

The standard range for electric trim with flaps extended is:

A

0.05 to 14.5 units

50
Q

The standard range for electric trim with flaps retracted is:

A

4.3 to 14.5 units

51
Q

A runway trim can be caused by:

A
  1. the uncommanded operation of the main electric trim
  2. the uncommanded operation of the autopilot trim
52
Q

In the event of an electric trim runway, the first action is:

A

To move the control column in the opposite direction to cutout the trim circuit

53
Q

The operation of the speed trim system occurs most frequently:

A

During takeoff and go-around whith a low gross weight and after centre of gravity.

53
Q

The operation of the speed trim system occurs most frequently:

A

During takeoff and go-around whith a low gross weight and after centre of gravity.

54
Q

Speed trim operation is indicated by:

A

The movement of the trim wheel without pilot input or autopilot engagement.

55
Q

Speed trim requirements are:

A
  1. airspeed 100kts
  2. 10 seconds after liftoff
  3. 5 seconds after release of trim switches
  4. A/P not engaged
  5. sensing stabiliser trim requirement
56
Q

The standby yaw damper is installed to:

A

improve handling qualities during manual reversion flight after a failure of both the A and B hydraulic systems

57
Q

The standby yaw damper is available when:

A

Both FLT CONTROL switches are positioned to STBY RUD and the YAW DAMPER switch has been reset to ON. It is available from takeoff to landing rollout.

58
Q

The standby yaw damper is capable of inputs up to:

A

2.5 degrees

59
Q

The yaw damper normally:

A
  1. prevents Dutch roll
  2. provides turn coordination
  3. provides gust damping
60
Q

SMYD 1 controls:

A

yaw damping during normal operations and requires system B hydraulic pressure.

61
Q

SMYD 2 operates:

A

the standby yaw damper during standby rudder operation

62
Q

The B737-800 has ___ flight spoilers and ___ ground spoilers.

A

4, 2

63
Q

The A hydraulic system powers which flight spoilers?

A

2,4,9,11

64
Q

The B hydraulic system powers which flight spoilers?

A

3,5,8,10

65
Q

The ground spoiler panels won’t extend until:

A

Weight is on the right main landing gear.

66
Q

The SPEEDBRAKE DO NOT ARM light illuminates:

A
  1. To indicate an abnormal condition exists
  2. To test inputs to the automatic speedbrake system
  3. During landing to indicate wheel speed has dropped below 60kts and the speedbrake lever is not in the DOWN position.
67
Q

The ground spoilers receive hydraulic pressure from:

A

The A system.

68
Q

The trailing edge device consist of:

A

Double slotted flaps inboard and outboard of each engine.

69
Q

Trailing edge devices are powered by:

A

The B hydraulic system

70
Q

What is the difference between a flap asymmetry and a flap skew?

A

Asymmetry is a difference in flap positions between the two wings and a skew is a difference in rate of extension or retraction.

71
Q

The three uncommanded TE flap conditions are:

A
  1. movement away from the commanded position.
  2. Continued movement after reaching a commanded position
  3. Movement in a direction opposite to the commanded position.
72
Q

An uncommanded movement of the TE flaps is countered by:

A

The FSEU shutting down the TE drive unit by closing the TE Flap Bypass Valve.

73
Q

There are ___ leading edge slats and ___ leading edge flaps.

A

4, 2

74
Q

The difference between use of the alternate function on the leading edge and trailing edge devices is that:

A

leading edge devices cannot be retracted.

75
Q

Asymmetry is provided on which leading edge devices?

A

Slats 2-7 only. Outboard slats 1 & 8 and leading edge flaps have no monitoring.

76
Q

In order for un-commanded leading edge device motion to be detected:

A

No TE flap position or autoslat command is present and:

  1. Two LE flaps move on one wing or
  2. Two or more slats move on one wing.
77
Q

What prevents the LE devices operating in cruise?

A

The FSEU maintains pressure on the retract lines and depressurises the extend and full extend lines.

78
Q

Autoslats will operate when:

A

The angle of attack reaches a point close to stick shaker activation.

79
Q

If B system pressure is low, the autoslat system is powered by:

A

The A hydraulic system via the PTU using the B system reservoir.

80
Q

The ___ system provides pressure to the autoslat control valve.

A

B

REX - 737 Systems (17 decks)

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