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Oral Prep 767 > Flight Controls > Flashcards

Flight Controls Flashcards

1
Q

Describe the Pitch Feel Unit

A

2 units that artificially generate control feel.
The units use HYD fluid from the L + C system

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2
Q

What are the 3 types of trim?

A

Electric Trim – Stab
Alternate Trim
Autopilot – Auto trim

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3
Q

What does pushing APP do with respect to the electrical bus systems?

A

Separates the electrical system.
Uses static inverted to convert DC to AC for the Centre Autopilot

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4
Q

How is trim moved?

A

2 motors

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5
Q

How does the PES control trim?

A

R HYD system has a motor that uses trapped line fluid.
¼ rate movement

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6
Q

At what rate does the Autopilot trim?

A

Half

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7
Q

When does aileron lockout happen?

A

Outboard = High speed
Inboard = works at all ranges

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8
Q

How are the spoilers controlled?

A

Electrically controlled
Hydraulically actuated

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9
Q

Aileron droop occurs when?

A

Take off flap settings

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10
Q

What does a spoiler light indicate?

A

Spoiler fault
Spoilers fail in pairs

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11
Q

What does an Auto Speedbrake light indicate?

A

Fault
Do not arm speed brake
450’ penalty applied to LDR (QRH non normal)

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12
Q

What does the speed brake light indicate?

A

Speed brakes extended below 800’ or landing flap extended

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13
Q

When does the Yaw Damper INOP light extinguish on power up?

A

1 IRU aligned

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14
Q

How many Flap drive units are there?

A

3 each wing
Elec control
HYD Actuated

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15
Q

How many fuel quantity probes are there?

A
  1. 1 in each of the L and R
    2 C probes
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16
Q

How is the gear held down?

A

Mechanical Down locks

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17
Q

Which hydraulic system is responsible for actuating the landing gear?

A

C HYD

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18
Q

How is the gear controlled?

A

Electrically controlled, HYD actuated

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19
Q

What does the Lever lock over ride switch do?

A

Manually releases the lever lock

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20
Q

If there is no C HYD pressure, can the gear be retracted?

A

No

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21
Q

How much pressure is required to move the landing gear?

A

3000psi

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22
Q

Gear handle goes up, what happens?

A

Doors open

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23
Q

How are the main gear doors held up?

A

Mechanical uplocks

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24
Q

What does moving the gear handle from UP to Off do?

A

Slowly releases the HYD pressure from the gear system. Main Gear comes to rest on the doors
Nose wheel held up by mechanical uplocks

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25
Q

If the C HYD system fails in flight, how do we extend the gear?

A

Call for the checklist
Alternate gear extension

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26
Q

How do the main and nose gear extend?

A

3000psi from C HYD. Held down with downlocks

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27
Q

What does alternate gear extension do?

A

Uses electricity to open door uplocks, opens doors (never to close again)
Door light will be displayed because doors don’t close after gear extension

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28
Q

If gear disagree light remains after running checklist, how else can you check if the gear is down?

A

Set landing flap, and wait for landing configuration warning

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29
Q

When does the main gear logic switch to ground mode?

A

Tilt is less than 1 degree

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30
Q

Rudder pedal provide a maximum deflection of?

A

7 degrees

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31
Q

The tiller provides a deflection of?

A

65 degrees

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32
Q

What is the turn radius?

A

146’

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33
Q

The parking brake is part of which HYD system?

A

The normal

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34
Q

If the parking brake valve is off what does that mean?

A

Parking brake valve is closed. Brakes set

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35
Q

Which fluid is used to set the park brake?

A

Anti skid return fluid

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36
Q

If the parking brake light is on, what does that mean?

A

Parking brake valve is open either partially or fully

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37
Q

On taxi, if the parking brake light comes on, what does that mean?

A

Anti skid not operative. TLR information no longer valid

38
Q

If the parking brake is set with 1050/1100psi, what happens?

A

Parking brake will set, but may not hold for very long

39
Q

Which HYD system do normal brakes require?

A

Right HYD

40
Q

If you have normal brakes, what other system do you generally have?

A

Auto brakes

41
Q

How do Auto brakes decelerate?

A

Deceleration rate

42
Q

Auto brakes 3 selected, how do you transition to manual braking for taxi. How can you disarm auto brakes 3?

A

Press on the toe brakes
Move thrust levers to TO range
Speed brake handle moved back to down
Select disarm on auto brakes

43
Q

In flight what could cause auto brake selection to move to disarm?

A

A fault in the system
R HYD failure
Anti skid failure
Air/Ground logic

44
Q

When’s does the auto brakes light illuminate

A

Any time autobrakes disarmed due to normal functions or system faults

45
Q

With loss of R HYD pressure light, and switching between normal and alternate brakes, what moves the brake valve?

A

Brake valve will reposition with loss of pressure, not quantity.

46
Q

How do you know you have successfully transitioned from normal to alternate brakes?

A

Brake source light is OFF

47
Q

Alternate brakes, what anti skid do we have?

A

Alternate anti skid, tandem wheel pairs. No autobrakes

48
Q

What’s the purpose of the C HYD resevoir standpipe?

A

Trap fluid from reserve brakes in the event of loss of HYD fluid

49
Q

What does the brake source light mean?

A

Loss of C + R HYD

50
Q

When using accumulator brakes, what are the considerations?

A

Long dry runway – anti skid with contaminated will depleat brake pressure
Normal brakes and anti skid available
1 steady application of brakes

51
Q

If the brake source light comes on and goes out by itself, what has happened?

A

Boeing has met the logic to turn the light off. Follow the checklist

52
Q

What happens when turning on Reserve brakes and steering?

A

Boeing forces 2 ISLN valve’s to correct position
C1 HYD pump powered, no matter the position of the switch
Brake source light should go out (if logic met)

53
Q

What does the Reserve BKS & STRG light mean?

A

Valve(s) hasn’t gone to correct position

54
Q

What Anti skid is available with the different modes of braking?

A

Normal Brakes - Normal
Alternate Brakes - Alternate
Accumulator Brakes - Normal
Reserve Brakes - Alternate

55
Q

Brake temp warning on EICAS displays when?

A

5 and above

56
Q

What attitude will cause a tail strike?

A

+9.6

57
Q

What’s the purpose of the tail skid?

A

Protect from strike and protect pressure

58
Q

How does the tail skid extend/retract?

A

With the gear
C HYD only

59
Q

What does the tail skid light mean?

A

Disagreement of position with position of gear
Not always in same position as a gear

60
Q

What are the available positions of the leading edge slats?

A

Up
Mid
Full (Used with landing flap)

61
Q

How does alternate flap extension extend flaps?

A

Electricity – longer extension

62
Q

How are the flaps moved?

A

Input
3 flap drive units – they command flap position
HYD/Electric

63
Q

When is assymetry protection provided for flaps?

A

LE – in normal and alternated flap
TE – in normal

64
Q

When does flap load relief work?

A

Only TE
Flap 25 and 30 only
Load relief retracts flap directly to 20

65
Q

What brings on a LE Flap Light?

A

Detected assymetry
Flap disagree

66
Q

What brings on a TE Flap Light?

A

Assymetry detected
Flap position disagree
Load relief FAILURE

67
Q

When would alternate flap extension be used?

A

No HYD
Handle wont work

68
Q

When is the PRV closed?

A

Onb take off, the engines are producing 150+psi, PSV closes to limit duct pressure to approx 42psi

69
Q

When does the HPSOV open?

A

HPSOV opens at any low power setting
When there isn’t enough pressure in the ducts
Electrically controlled
Pneumatically operated

70
Q

What does the PRV do?

A

Partner of the bleed air value to regulate the bleed air pressure to approximately 42%
Variable position valves

71
Q

On start up what is the position of the PRV/Bleed valve?

A

Open

72
Q

On take off roll what is the position of the PRV/Bleed valve?

A

Closed

73
Q

What does the fan air pre cooler do?

A

Uses outside air to cool down air coming from the engine

74
Q

What kind of valve is HPSOV?

A

Non variable

75
Q

How does the Master Trim air system work?

A

Takes duct air and warms it for distribution through individual zone control valves

76
Q

How many recirculation fans are there?

A

1 FWD
1 AFT
They capture conditioned air for redistribution to the cabin, decreasing Pack workload

77
Q

Why is the centre isolation valve always open?

A

When centre isolation valve isn’t open in flight you can’t get air to the ADP, that’s why we don’t ever close it in normal operation

78
Q

What could bring the bleed light on?

A

Too much pressure in the valve

79
Q

What could cause too much pressure in the duct?

A

HPSOV fully open when not required
PRV stuck open

80
Q

All isolation valves need to be open for start, why?

A

So APU can reach all 4 ducts.
1 way check valves mean air has to travel through the ISLN valves.

81
Q

What could cause too much pressure in the duct?

A

HPSOV fully open when not required
PRV stuck open

82
Q

All isolation valves need to be open for start, why?

A

So APU can reach all 4 ducts.
1 way check valves mean air has to travel through the ISLN valves.

83
Q

WHat are the 3 pneumatically powered items on the R Duct system?

A

R Pack
R Wing anti ice
R HYD Resevoir positive pressure

84
Q

What are the 3 pneumatically powered items on the L Duct system?

A

L Pack
L Wing Anti Ice
L HYD Resevoir positive pressure

85
Q

What is pneumatically powered items on the C Duct system?

A

F Cargo Heat

86
Q

What are the pneumatically powered items on the Body Duct system?

A

AFT Cargo Heat
ADP
C HYD REsevoir positive pressure
Bulk Cargo Heat

87
Q

What do the one way check valves do?

A

One way check valves before the ISLN valves prevent cross side bleed air with the ISLN valves open.

88
Q

What are the bleed air valves?

A

Pressure regulating and shut off valves

89
Q

Where is bleed pressure and OVHT temperature sensed?

A

Within the duct

90
Q

What closes the bleed valve automatically (by Boeing logic)?

A

OVHT light

91
Q

What is happening with the display of the OVHT light?

A

OVHT > Bleed valve closes > associated duct pressure decreases > associated pack off light > matching switch with where the valve already is

Oral Prep 767 (37 decks)

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