B-737 Ng - Flight Controls

Front 1

What does moving the A or B FLT CONTROL switch to OFF do?

Back 1

Closes flight control SOV which isolates hydraulic pressure to the;

Ailerons

Elevators

Rudder

AND yaw damper if B system is is in OFF or SR

Front 2

What does it mean when the YAW DAMPER light is illuminated?

Back 2

The Yaw damper is not engaged

Front 3

When would you use the Flight Spoiler switches?

Back 3

You wouldn't, maintenance only

Front 4

Will the STANDBY HYDRAULIC LOW PRESSURE light illuminate if the standby pump isn't operating?

Back 4

No, it is only armed when the standby system is operating

Front 5

When using alternate flaps, can the LE flaps and slats be retracted once extended?

Back 5

No, not by alternate system (LE Devices)

Trailing edge flaps can be retracted

Front 6

When will the FEEL DIFF PRESS light illuminate?

Back 6

Indicates excessive differential pressure between the two Hydraulic systems

Front 7

SPEED TRIM FAIL light indicates what?

Back 7

Failure of the speed trim system

(Dual channel)

Front 8

What is indicated when the MACH TRIM FAIL light illuminates?

Back 8

Failure of the mach trim system

(Dual channel)

Front 9

What is indicated when the AUTO SLAT FAIL light is illuminated?

Back 9

Master Caution

Failure of the autoslats system, both SMYD computers failed

Recall

Single channel SMYD computer failure

Front 10

When is flap load relief armed?

Back 10

Flap lever positions 30 and 40

Front 11

What are the secondary flight controls?

Back 11

TE flaps and LE flaps and slats and Spoilers

Front 12

What does the Power Transfer Unit (PTU) control?

Back 12

Fluid to the LE devices and Autoslats when the ENGINE DRIVEN PUMP volume is lost on the B system

Front 13

At what speed does the rudder become effective?

Back 13

40-60 knots

Front 14

With a total Hydraulic failure (manual reversion) can the Ailerons still be positioned?

Back 14

Yes with both A and B systems failed, using control wheel. Forces are obviously higher.

During Manual reversion, AILERON TRIM IS NOT AVAILABLE

Front 15

What happens if the ailerons jam?

Back 15

Using the FO's control wheel roll control using flight spoilers only. The ailerons and the captain's control wheel are INOPERATIVE

Front 16

What happens if the flight spoilers jam?

Back 16

Force applied to the captain's control wheel will control the ailerons. Spoiler mixing and the FO control Column will be inoperative.

Front 17

How is the airplane rolled?

Back 17

Combination of ailerons and 4 flight spoilers

Front 18

With loss of both Hydraulic systems (manual reversion) can elevator force be applied?

Back 18

Yes, manually by crew using control column. More force is required

Front 19

If the control column jams can they be separated?

Back 19

Yes, whichever column breaks free after the manoeuvre will be the operable control column. Less effectiveness is a result but stabiliser trim is available

Front 20

Is elevator feel given to pilots?

Back 20

Yes the elevator feel system sends simulated aerodynamic forces to the control column using the elevator feel and centering unit

Front 21

Is the Mach trim system automatic and what does it do?

Back 21

Yes

It automatically adjusts elevators above Mach .615 to avoid Mach tuck

Flight Control Computers

Front 22

Above what speed is full rudder authority limited?

Back 22

>135 knots

Front 23

How many flight spoilers and ground spoilers are there?

Back 23

Flight: 8

Ground: 4

Total 12

Front 24

When will the speedbrakes retract on the ground automatically?

Back 24

On an RTO or landing when the thrust levers are advanced

Front 25

How many LE flaps and slats are there?

Back 25

2 flaps inboard of the engine and 4 slats outboard of the engine

Front 26

What are the landing flap positions?

Back 26

15,30,40

Front 27

How do the flaps and slats extend when the handle is moved from up to position 1,2,5?

Back 27

TE flaps extend to the commanded position AND;

LE Flaps extend to full position

LE slats extend to the extended position

Front 28

How do the flaps and slats extend when the handle is moved beyond position 5?

Back 28

TE flaps extend to commanded position AND;

LE Flaps will stay in fully extended position

LE Slats will extend to the FULL position

Front 29

How many positions do the LE Slats have?

Back 29

3

Up

Extend

Extended

Front 30

How many positions do the LE Flaps have?

Back 30

2

Up

Full extended

Front 31

What flaps does load relief affect and when is it armed?

Back 31

Flaps 30/40 and only TE Flaps

Front 32

How do you know flap load relief is occurring?

Back 32

FLAP LOAD RELIEF is illuminated and the flap indicator will show the position of the flaps

Front 33

If the flaps are set to 30 what setting will LOAD RELIEF retract the flaps to if needed?

Back 33

Flaps 25

Front 34

When are Autoslats armed?

Back 34

Positions 1,2,5 (because the LE slats are only in the extend position) this allows them to fully extend prior to stick activation

Front 35

Will Autoslats retract after activation?

Back 35

Yes if the airplane attitude is reduced below the stall critical angle

Front 36

Is the Alternate flaps system Electric or Hydraulic?

Back 36

Both, leading edge devices are Hydraulic and trailing edge Electric

Front 37

Can LE devices be retracted when using the standby system?

Back 37

No

Front 38

What flap protections are there?

Back 38

Asymmetry

Skew Detection & Protection (flaps not operating at the same rate)

Uncommanded Motion

Load Relief

Front 39

During cruise to prevent uncommanded motion what does the FSEU do?

Back 39

The FSEU maintains pressure on the retract lines and depressurizes the extend and full extend lines

Front 40

To complete the STALL WARNING TEST, how long must AC transfer busses be powered for?

Back 40

4 minutes

Front 41

Explain the LE Devices panel on the overhead panel

Back 41

Yellow - transit

Green - LE flaps fully extended, LE Slats in extend

Green - LE Slats fully extended position

Test - illuminates lights

Front 42

When the STBY RUD ON light illuminates what has happened?

Back 42

The SRSOV (standby rudder SOV) has successfully opened. Usually when the Standby pump has been activated manually or automatically

Front 43

Does the alternate flaps system extend TE flaps? If so what is different about how the TE flaps are extended VS leading edge devices?

Back 43

TE flaps are extended using seperate electrical motor where the LE Devices are extended using the standby Hydraulic motor. Both are controlled using the same switch. LE devices will go to the fully extended position

Front 44

Is there a speed restriction when using the Alternate flaps?

Back 44

Yes, 230 knots (placarded below the gear)

Front 45

What does the speed trim system do?

Back 45

Automatically trims to return the airplane to its manual trim position the pilot set with autopilot not engaged

Front 46

What does the STAB TRIM OVRD switch do?

Back 46

It allows the airplane to be trimmed in an opposite direction to how the control Column is being manipulated

Front 47

When does the LE FLAPS TRANSIT light illuminate? (4)

Back 47

Any LE device in transit

LE device not in correct position with respect to TE flap

A LE Slat skew condition exists (2-7)

During alternate flap extension until LE devices are fully extended and TE flaps reach 10

Front 48

When does the LE FLAPS EXT light illuminate?

Back 48

All LE Flaps extended LE slats in extend position (flap lever 1,2,5)

LE devices fully extended

Front 49

What is the difference between flap skew and flap assymetry?

Back 49

Skew: The flap is twisting (inboard end of flap does not align with the outboard end)

Assymetry: flap position on one wing doesn't match the position of the same flap on the opposite wing

Front 50

How will a skew condition be shown on the flap indicator?

Back 50

One pointer will be 15 degrees apart from the other pointer

Front 51

What does FSEU stand for?

Back 51

Flap slat electronic unit

Front 52

What does the Flap Indicator display?

Back 52

Position of the TRAILING EDGE FLAPS ONLY.

Also displays the skew (15 degree split between needles) or assymetry condition (flap doesn't match opposite flap position)

Front 53

Apart from the flap indicator how else will you know a flap assymetry has occurred?

Back 53

An uncommanded roll occurs when the flaps change position

Front 54

How is the stabilizer powered?

Back 54

Electrically

Front 55

What is the green band on the Stabilizer trim indicator?

Back 55

The takeoff green band indication

Front 56

Is there any stall protection?

Back 56

Yes, the pressure on the control column doubles as aircraft AoA approaches stall. The speed trim system also trims the stabilizer nose down in addition to Autoslats and AT wakeup

Front 57

If only the B system FLT CONTROL switch is moved to STBY RUD can the yaw damper switch be moved to on?

Back 57

No.

Front 58

When does speedbrake deployment occur if the lever was in the DOWN detent?

Back 58

With the speedbrake lever in the down position AND;

Wheel spin up

Thrust levers in idle

RT levers positioned for RT

Front 59

Where are the flap lever gates?

Back 59

Flaps 1 and 15 (Go around)

Front 60

When using alternate flaps does assymetry or skew protection exist?

Back 60

No, trailing edge protections are lost in alternate mode

Front 61

How would uncommanded motion be displayed to crew?

Back 61

Flap indicator not agreeing with flap lever position

Front 62

The Stabilizer trim has how many speed settings?

Back 62

2

High speed, with flaps extended

Low speed, flaps up

Front 63

During landing when does the auto speedbrake move to the UP position?

Back 63

Speedbrake ARMED

RA <10

Landing gear strut compresses

Both thrust levers to idle

Wheel spin up (60 knots or more)

Front 64

What is manual reversion?

Back 64

Loss of Hydraulic system A and B pressure

Front 65

During manual reversion does roll control exist?

Back 65

Yes, AILERONS can be manually positioned using the control wheel with higher force. Spoiler intermixing is disabled due to loss of hydraulic pressure

Front 66

Using alternate flaps what are the LE and TE device position settings?

Back 66

LE Devices Fully extended and TE flaps 15

Front 67

When manual reversion occurs what roll and pitch control is there?

Back 67

Roll using ailerons and pitch using elevator. Control forces will be higher, standby yaw damper also available

Stabilizer trim available for pitch.

Aileron trim NOT available during manual reversion

Front 68

During manual reversion will the Yaw damper be available?

Back 68

Yes, through the standby system

Front 69

If the SRSOV fails to open what indication will you see?

Back 69

LOW PRESSURE light ON and STBY RUD ON light will not illuminate with a FLT CTROL switch in SBRUD

Front 70

What controls the Yaw Dampers?

Back 70

SMYD computers.

Front 71

Is aileron trim available with manual reversion?

Back 71

NO

Front 72

Moving the control wheel more than how many degrees causes the flight spoilers to rise?

Back 72

10 degrees

Front 73

What computer does the speed trim and mach trim system use?

Back 73

FCC (Flight control computer)

Front 74

If the SPEEDBRAKE DO NOT ARM light illuminates can we use the speedbrakes on the ground?

Back 74

Yes, manually

Front 75

The SPEEDBRAKES EXTENDED light illuminates when in flight?

Back 75

Speedbrake lever beyond ARMED and;

TE flaps >10 OR

RA <800RA

Front 76

If the B FLT CONTROL switch is moved to OFF what happens?

Back 76

B system flight control valve closes and Yaw Damper is taken offline