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FLIGHT CONTROLS Flashcards

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1
Q

Which hydraulic system powers the trailing edge flaps and leading edge slats and leading edge flaps?

A

System B

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2
Q

Which hydraulic systems normally power the rudder?

A

Systems A and B

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3
Q

What hydraulic system powers the rudder if system A and B are not available?

A

Stby hydraulic system

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4
Q

How many flight spoilers are there?

A

8

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5
Q

How many ground spoilers are there?

A

4

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6
Q

How many ailerons?

A

2

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7
Q

How many rudder?

A

1

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8
Q

How many elevators do we have?

A

2

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9
Q

During takeoff, the rudder becomes aerodynamically effective between 40 and 60 knots. True or False?

A

True

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10
Q

How many spoiler panels are there total on each wing?

A

6

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11
Q

Which control wheel is technically linked to the ailerons?

A

Captains.

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12
Q

Which control wheel is technically linked to the spoiler mixer in th NG or the SEC on the MAX?

A

First Officers

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13
Q

Hydraulic pressure shutoff valves are controlled by the two flight SPOILER switches. True or False?

A

True

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14
Q

When the control wheel is displaced more than approximately how many degrees, spoiler deflection is initiated?

A

10 degrees

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15
Q

Is there manual reversion with regard to the elevators and ailerons?

A

Yes

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16
Q

How is the stabilizer normally moved?

A

Electrically

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17
Q

Can you trim the stabilizer manually?

A

Yes by moving the wheel

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18
Q

How many electric motors are there for the stabilizer trim?

A

1 electric motor

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19
Q

Explain Elevator Control Column Override Mechanism?

A

In the event of a control column jam, an override mechanism allows the control columns to be physically separated. Applying force against the jam will breakout either the captain’s or first officer’s control column. Whichever column moves freely after the breakout can provide adequate elevator control.

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20
Q

Explain Elevator Jam Landing Assist System available in the MAX aircraft?

A

If a jam occurs in the aft elevator control mechanism, both control columns have a limited range of motion. During approach and landing, the Elevator Jam Landing Assist System uses the flight spoilers for small changes to the flight path. To activate the system, the Elevator Jam Landing Assist switch must be selected ON, the actual flap position must be 1 or greater, and the autopilot must be disengaged.

With the system activated, the flight spoilers deploy to a preset position. The control
wheel steering force sensors detect forces applied to the control column. A push on
the control column causes the spoilers to extend farther, increasing the descent rate.
A pull on the control column causes the spoilers to retract, decreasing the descent
rate.

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21
Q

What are the conditions to use the Elevator Jam Landing Assist System in the MAX?

A

Elevator Jam Landing Assist switch must be selected ON
Auto pilot off
Flaps 1 or greater

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22
Q

FEEL DIFF PRESS light. What does it mean?

A

When either hydraulic system or elevator feel pitot system fails, excessive differential hydraulic pressure is sensed in the elevator feel computer and the FEEL DIFF PRESS light illuminates.

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23
Q

How does the mach trim system work?

A

A Mach trim system provides speed stability at the higher Mach numbers. Mach trim is automatically accomplished above Mach .615 by adjusting the elevators with respect to the stabilizer as speed increases.

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24
Q

Where does the mach trim system get mach information from?

A

The flight control computers use Mach information from the ADIRU to compute a Mach trim actuator position.

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25
With the autopilot engaged, stabilizer trim is accomplished through the autopilot stabilizer trim circuit. True or False?
True
26
Stabilizer trim switches on each control wheel actuate the electric trim motor through the main electric stabilizer trim circuit when the airplane is flown manually. True or False?
True
27
What are the two modes for the main electric trim and the auto trim?
High speed - Flaps extended | Low speed - Flaps retracted
28
What happens if you use main electric trim with the auto pilot engaged?
Auto pilot disengages
29
On the NG, the STAB TRIM MAIN ELECT cutout switch and the STAB TRIM AUTOPILOT cutout switch, located on the control stand, are provided to allow the autopilot or main electric trim inputs to be disconnected from the stabilizer trim motor. True or False?
True
30
What is the function of the STAB TRIM override switch?
When the STAB TRIM override switch is positioned to OVERRIDE, electric trim can be used regardless of control column position.
31
What does the control column actuated stab trim cutout switches do?
Control column actuated stabilizer trim cutout switches stop operation of the main electric and autopilot trim when the control column movement opposes trim direction.
32
Once you place the STAB TRIM override switch to override, will autopilot trim work anymore?
No. Only manual electric trim will work
33
Does manual trim using the wheel, have more authority range than autopilot and electric trim?
Yes
34
What is the functional difference in regard to the stab trim cutout switches on the MAX?
The STAB TRIM PRI cutout switch and the STAB TRIM B/U cutout switch are located on the control stand. If either switch is positioned to CUTOUT, the autopilot, main electric and Speed Trim System (Speed Trim function and MCAS function) trim inputs are disconnected from the stabilizer trim motor.
35
In the MAX, what additional pitch stability augmentation system is part of the speed trim system?
MCAS
36
With regard to the MAX, the control column actuated stab trim cut out switches cuts out which trim systems?
Control column actuated stabilizer trim cutout switches interrupts operation of main electric stabilizer trim, autopilot trim and the Speed Trim function when the control column movement opposes trim direction.
37
With regard to the MAX, does the control column actuated stab trim cut out switches cuts out the MCAS system since its a part of the speed system in the MAX?
No. It will not affect MCAS. Only the speed trim system part will be affected.
38
Aft control column movement does not interrupt Maneuvering Characteristics Augmentation System (MCAS) nose down trim commands. True or False?
True
39
Forward control column movement interrupts MCAS nose up trim | commands. True or False?
True
40
Explain the software column cutout function available in the MAX?
In addition to the control column actuated stabilizer trim cutout switches, the FCC contains a software column cutout function which adds a layer of redundancy to mitigate a latent failure of the column cutout switches.
41
Does the software column cutout function affect the main electric trim?
No
42
What are the requirements fir speed trim to be operational?
Auto pilot off Flaps retracted or extended Speed 100 kts - M0.60 10 secs after takeoff
43
In the MAX, what does the SPEED TRIM FAIL light mean?
Speed trim and MCAS are both not operational anymore.
44
In the MAX, what happens if the left and right AOAs disagree by 5.5 degrees or more with the flaps retracted?
Speed Trim Light illuminates and speed trim and MCAS are not functional anymore
45
What is different about the stab trim cutout switches in the MAX vs the NG?
In the MAX, cutting out either switch will disable all trim systems including the MCAS vs the NG where you individually cutout the auto pilot trim or the main electric trim.
46
What is the High AOA mode in the MAX?
The Speed Trim function contains a High AOA mode that is used to provide increased stabilizer commands at elevated AOA. As AOA increases toward stick shaker, the Speed Trim function transitions to the High AOA mode to command additional nose down stabilizer to increase control column forces. AOA is used only to transition into and out of the High AOA mode and does not determine the amount of stabilizer command.
47
What are the conditions for MCAS to activate?
``` Conditions for operation are listed below: — AOA above threshold — Up to Mach 0.84 — 10 seconds after takeoff — Flaps up — Autopilot not engaged ```
48
How many flight control computers are there? Do they monitor each other?
2. Yes. If one is giving erroneous commands, the other one takes over.
49
What is the Elevator Autopilot Monitor?
The Autopilot Elevator Monitor protects against erroneous elevator commands that can result in erroneous autopilot stabilizer trim commands. The Autopilot Elevator Monitor is available when: — Autopilot is engaged, in single channel, and — Pitch mode is other than G/S or G/P, and — Flaps are 15 or less
50
STAB OUT OF TRIM light illuminates in flight. What does that mean?
The STAB OUT OF TRIM light illuminates in flight if the elevator autopilot monitor system activates and remains illuminated until the condition is no longer present or the autopilot is disengaged.
51
Stabilizer Cross-FCC Trim Monitor. What is it?
Stabilizer Cross-FCC Trim Monitor. The Cross-FCC Trim Monitor protects against erroneous stabilizer trim commands. The Cross-FCC Trim Monitor is available when a single autopilot is engaged and during manual flight.
52
Is the Stabilizer Cross-FCC Trim Monitor available during Single channel autopilot use?
Yes
53
Is the Stabilizer Cross-FCC Trim Monitor available during Dual channel autopilot use?
No
54
Is the Stabilizer Cross-FCC Trim Monitor available during Manual flying?
Yes
55
What does a SPEED TRIM FAIL light on a recall mean?
Indicates failure of a single FCC channel when MASTER CAUTION recall is activated and light extinguishes when Master Caution System is reset.
56
During normal operation the main yaw damper uses which hydraulic system?
System B
57
How many yaw dampers do we have?
2. Main and Stby yaw damper
58
The standby yaw damper uses which hydraulic system?
Standby hydraulic system
59
Which computers control the yaw dampers?
Stall Management/Yaw Damper (SMYD) computers
60
Which is the only hydraulic system that powers all the ground spoilers?
Hydraulic system A powers all four ground spoilers, two on the upper surface of each wing.
61
How many ground spoilers do we have?
4. There are two on each wing.
62
The SPEED BRAKES EXTENDED light illuminated in the air means what?
- Speed brakes are extended while in the landing configuration - Speed brakes extended below 800 feet AG - Thrust levers are greater than idle for 15 seconds, or a thrust lever is greater than approximately 40 degrees for 3 seconds
63
On the MAX aircraft, if the speed brakes are extended and the SEC looses power, what happens?
In the event electrical power to the SCE is lost, all spoilers are inoperative and will retract if extended.
64
On the MAX, what is the landing attitude modifier system?
The Landing Attitude Modifier (LAM) system performs two functions. The first LAM function applies when the flaps are in the 30 or 40 position. To maintain acceptable nose landing gear contact margin, LAM symmetrically deploys flight spoilers on approach to reduce lift and force the airplane to use a higher angle of attack. The amount of spoiler deflection depends on the approach speed. Deflection begins at approximately 10 knots above VREF. The second LAM function applies when flaps are positions 15 through 30 and the thrust levers are near idle. This function also symmetrically deploys flight spoilers, in order to generate additional drag.
65
On the MAX, what is the maneuvers load alleviation system?
The Maneuver Load Alleviation (MLA) system reduces wing and aft fuselage bending loads during certain maneuvers and normal load factors. The MLA system retracts extended speedbrakes during maneuvers that result in higher load factors at certain gross weights. The SPD BRK lever does not move during MLA activation. When the conditions for MLA are no longer present, the speedbrakes will return to the selected position.
66
Can you manually override the speed brake load alleviation feature?
Yes
67
In the MAX, what is the Emergency Descent Speed brakes Function?
In order to minimize exposure time of passengers and crew to high cabin altitude, an Emergency Descent Speed brakes (EDS) function is included. EDS is armed when the airplane is above 30,000 feet and the cabin altitude warning is active. Moving the speedbrake lever activates the function. When activated, the EDS raises the speedbrakes to a higher than normal position when the speedbrake lever is in the flight detent. EDS is deactivated when the spoilers are stowed, or when the cabin altitude warning is no longer active.
68
During landing, what conditions are required for the speed brakes to deploy?
- Speed brakes armed - landing gear strut compresses on touchdown - main landing gear wheels spin up (more than 60 kts) - RA less than 10 ft - both thrust levers are retarded to IDLE
69
During landing, Wheel spinup or compression of any landing gear strut enables the flight spoilers to deploy. True or False?
True
70
During landing, on certain aircraft, compression of the right main landing gear strut enables the ground spoilers to deploy and on certain aircraft, compression of both main landing gear struts enables the ground spoilers to deploy. True or False?
True
71
On certain aircraft, following an all flaps up (no flap) landing, the SPEED BRAKE lever will not move beyond the FLIGHT DETENT and the spoilers will not fully deploy. True or False?
True
72
How many slats per wing?
4
73
How many total slats?
8
74
How many leading edge flaps per wing?
2
75
How many total leading edge flaps?
4
76
Max flap extension altitude?
20000 ft
77
Which hydraulic system powers the flaps and slats normally?
System B
78
On the MAX, when does the slats go to full extend position?
When the FLAP lever is moved to 30 or 40
79
On the NG, when does the slats go to full extend?
When the FLAP lever is moved beyond the 5 position
80
On the NG, flap load relief is only available for flaps 30 and 40. True or false?
True
81
On the MAX, flap load relief is available from flaps 10 thru 40. True or False?
True
82
Flap load relief gets airspeed data from which ADIRU?
Left ADIRU. The left ADIRU is also the source for the captain’s airspeed indication. When the captain’s indicated airspeed is too high for the selected flap setting, flap load relief activates and retracts the TE flaps to the next lower setting below the selected flap lever position
83
Can you override the flap load relief system?
Yes. Desired flap position can be achieved by selecting the next higher flap detent beyond the desired flap position. For example, if the desired flap position is Flaps 30, select Flaps 40 and the flaps will extend to the Flaps 30 position. This applies for all flap selections protected by flap load relief.
84
Flap load relief is not available during alternate flap extension. True or False?
True
85
Which hydraulic system powers the auto slat system?
System B
86
What is the alternate hydraulic source of power to the auto slat system?
System A utilizing the power transfer unit (PTU)
87
How are the leading edge flaps and slats extended when using the alternate flap extension system?
Using standby hydraulic system
88
Do leading edge flaps and slats go to a mid range position while using alternate flap extension system?
No. They go to full extend right away
89
Can the leading edge flaps and slats be retracted using the alternate flap extension system?
No.
90
What powers the trailing edge flaps when using the alternate flap extension system?
Electrically moved
91
No asymmetry or skew protection is provided through the alternate (electrical) flap drive system. True or False?
True
92
What computer monitors the flaps and slats?
Flap Slat Electronic Unit (FSEU)
93
What does the FSEU do when it detects a skew or asymmetry or uncommanded motion in the flaps or slats?
It stops it
94
Flap load relief is active on the NG for which flap settings?
30 and 40
95
Which airspeed indication is used to activate flap load relief? Captains or First officer?
Captain side

B737 (22 decks)

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