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
2
Q
What are the 3 types of trim?
A
Electric Trim – Stab
Alternate Trim
Autopilot – Auto trim
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
4
Q
How is trim moved?
A
2 motors
5
Q
How does the PES control trim?
A
R HYD system has a motor that uses trapped line fluid.
¼ rate movement
6
Q
At what rate does the Autopilot trim?
A
Half
7
Q
When does aileron lockout happen?
A
Outboard = High speed
Inboard = works at all ranges
8
Q
How are the spoilers controlled?
A
Electrically controlled
Hydraulically actuated
9
Q
Aileron droop occurs when?
A
Take off flap settings
10
Q
What does a spoiler light indicate?
A
Spoiler fault
Spoilers fail in pairs
11
Q
What does an Auto Speedbrake light indicate?
A
Fault
Do not arm speed brake
450’ penalty applied to LDR (QRH non normal)
12
Q
What does the speed brake light indicate?
A
Speed brakes extended below 800’ or landing flap extended
13
Q
When does the Yaw Damper INOP light extinguish on power up?
A
1 IRU aligned
14
Q
How many Flap drive units are there?
A
3 each wing
Elec control
HYD Actuated
15
Q
How many fuel quantity probes are there?
A
- 1 in each of the L and R
2 C probes
16
Q
How is the gear held down?
A
Mechanical Down locks
17
Q
Which hydraulic system is responsible for actuating the landing gear?
A
C HYD
18
Q
How is the gear controlled?
A
Electrically controlled, HYD actuated
19
Q
What does the Lever lock over ride switch do?
A
Manually releases the lever lock
20
Q
If there is no C HYD pressure, can the gear be retracted?
A
No
21
Q
How much pressure is required to move the landing gear?
A
3000psi
22
Q
Gear handle goes up, what happens?
A
Doors open
23
Q
How are the main gear doors held up?
A
Mechanical uplocks
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
25
If the C HYD system fails in flight, how do we extend the gear?
Call for the checklist
Alternate gear extension
26
How do the main and nose gear extend?
3000psi from C HYD. Held down with downlocks
27
What does alternate gear extension do?
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
28
If gear disagree light remains after running checklist, how else can you check if the gear is down?
Set landing flap, and wait for landing configuration warning
29
When does the main gear logic switch to ground mode?
Tilt is less than 1 degree
30
Rudder pedal provide a maximum deflection of?
7 degrees
31
The tiller provides a deflection of?
65 degrees
32
What is the turn radius?
146’
33
The parking brake is part of which HYD system?
The normal
34
If the parking brake valve is off what does that mean?
Parking brake valve is closed. Brakes set
35
Which fluid is used to set the park brake?
Anti skid return fluid
36
If the parking brake light is on, what does that mean?
Parking brake valve is open either partially or fully
37
On taxi, if the parking brake light comes on, what does that mean?
Anti skid not operative. TLR information no longer valid
38
If the parking brake is set with 1050/1100psi, what happens?
Parking brake will set, but may not hold for very long
39
Which HYD system do normal brakes require?
Right HYD
40
If you have normal brakes, what other system do you generally have?
Auto brakes
41
How do Auto brakes decelerate?
Deceleration rate
42
Auto brakes 3 selected, how do you transition to manual braking for taxi. How can you disarm auto brakes 3?
Press on the toe brakes
Move thrust levers to TO range
Speed brake handle moved back to down
Select disarm on auto brakes
43
In flight what could cause auto brake selection to move to disarm?
A fault in the system
R HYD failure
Anti skid failure
Air/Ground logic
44
When’s does the auto brakes light illuminate
Any time autobrakes disarmed due to normal functions or system faults
45
With loss of R HYD pressure light, and switching between normal and alternate brakes, what moves the brake valve?
Brake valve will reposition with loss of pressure, not quantity.
46
How do you know you have successfully transitioned from normal to alternate brakes?
Brake source light is OFF
47
Alternate brakes, what anti skid do we have?
Alternate anti skid, tandem wheel pairs. No autobrakes
48
What’s the purpose of the C HYD resevoir standpipe?
Trap fluid from reserve brakes in the event of loss of HYD fluid
49
What does the brake source light mean?
Loss of C + R HYD
50
When using accumulator brakes, what are the considerations?
Long dry runway – anti skid with contaminated will depleat brake pressure
Normal brakes and anti skid available
1 steady application of brakes
51
If the brake source light comes on and goes out by itself, what has happened?
Boeing has met the logic to turn the light off. Follow the checklist
52
What happens when turning on Reserve brakes and steering?
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
What does the Reserve BKS & STRG light mean?
Valve(s) hasn’t gone to correct position
54
What Anti skid is available with the different modes of braking?
Normal Brakes - Normal
Alternate Brakes - Alternate
Accumulator Brakes - Normal
Reserve Brakes - Alternate
55
Brake temp warning on EICAS displays when?
5 and above
56
What attitude will cause a tail strike?
+9.6
57
What’s the purpose of the tail skid?
Protect from strike and protect pressure
58
How does the tail skid extend/retract?
With the gear
C HYD only
59
What does the tail skid light mean?
Disagreement of position with position of gear
Not always in same position as a gear
60
What are the available positions of the leading edge slats?
Up
Mid
Full (Used with landing flap)
61
How does alternate flap extension extend flaps?
Electricity – longer extension
62
How are the flaps moved?
Input
3 flap drive units – they command flap position
HYD/Electric
63
When is assymetry protection provided for flaps?
LE – in normal and alternated flap
TE – in normal
64
When does flap load relief work?
Only TE
Flap 25 and 30 only
Load relief retracts flap directly to 20
65
What brings on a LE Flap Light?
Detected assymetry
Flap disagree
66
What brings on a TE Flap Light?
Assymetry detected
Flap position disagree
Load relief FAILURE
67
When would alternate flap extension be used?
No HYD
Handle wont work
68
When is the PRV closed?
Onb take off, the engines are producing 150+psi, PSV closes to limit duct pressure to approx 42psi
69
When does the HPSOV open?
HPSOV opens at any low power setting
When there isn’t enough pressure in the ducts
Electrically controlled
Pneumatically operated
70
What does the PRV do?
Partner of the bleed air value to regulate the bleed air pressure to approximately 42%
Variable position valves
71
On start up what is the position of the PRV/Bleed valve?
Open
72
On take off roll what is the position of the PRV/Bleed valve?
Closed
73
What does the fan air pre cooler do?
Uses outside air to cool down air coming from the engine
74
What kind of valve is HPSOV?
Non variable
75
How does the Master Trim air system work?
Takes duct air and warms it for distribution through individual zone control valves
76
How many recirculation fans are there?
1 FWD
1 AFT
They capture conditioned air for redistribution to the cabin, decreasing Pack workload
77
Why is the centre isolation valve always open?
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
What could bring the bleed light on?
Too much pressure in the valve
79
What could cause too much pressure in the duct?
HPSOV fully open when not required
PRV stuck open
80
All isolation valves need to be open for start, why?
So APU can reach all 4 ducts.
1 way check valves mean air has to travel through the ISLN valves.
81
What could cause too much pressure in the duct?
HPSOV fully open when not required
PRV stuck open
82
All isolation valves need to be open for start, why?
So APU can reach all 4 ducts.
1 way check valves mean air has to travel through the ISLN valves.
83
WHat are the 3 pneumatically powered items on the R Duct system?
R Pack
R Wing anti ice
R HYD Resevoir positive pressure
84
What are the 3 pneumatically powered items on the L Duct system?
L Pack
L Wing Anti Ice
L HYD Resevoir positive pressure
85
What is pneumatically powered items on the C Duct system?
F Cargo Heat
86
What are the pneumatically powered items on the Body Duct system?
AFT Cargo Heat
ADP
C HYD REsevoir positive pressure
Bulk Cargo Heat
87
What do the one way check valves do?
One way check valves before the ISLN valves prevent cross side bleed air with the ISLN valves open.
88
What are the bleed air valves?
Pressure regulating and shut off valves
89
Where is bleed pressure and OVHT temperature sensed?
Within the duct
90
What closes the bleed valve automatically (by Boeing logic)?
OVHT light
91
What is happening with the display of the OVHT light?
OVHT > Bleed valve closes > associated duct pressure decreases > associated pack off light > matching switch with where the valve already is
