AH-64E > Flight Controls > Flashcards

Flight Controls Flashcards

(67 cards)

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1
Q

BUCS

A

Back up Control System- Fly by wire for jam or severance protection

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2
Q

3 types of flight controls

A

1) Hydraulic
2) Electrical
3) Mechanical

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3
Q

Cyclic control system

A

Lateral, Longitudinal

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4
Q

_____ controls are routed on the _______ side

A

Lateral, Left side of aircraft

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5
Q

________ Receive and combine controls inputs from cyclic and collective

A

Upper flight controls

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6
Q

________ from servo to non rotating squashplate

A

Collective bell crank

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7
Q

______ from lateral servo to non rotating swashplate

A

Lateral bell crank

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8
Q

_______ longitudinal servo to non-rotating swashplate

A

Longitudinal bell crank

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9
Q

_______ transmit longitudinal motion fixed point for non rotating swashplate

A

Torque link

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10
Q

______ receives inputs from lateral links and torque links and transmits inputs to main rotor

A

Swashplate assembly

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11
Q

_______ Transmit rotational power to rotating swashplate

A

Scissors assembly

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12
Q

_______ Transmit inputs from swashplate to rotor head

A

Pitch change (PC) links

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13
Q

________ provides directional control to the tail rotor system

A

Pedals/ anti-torque

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14
Q

______ boost the crew member’s manual input from the cyclic, collective or directional pedals using hydraulic pressure

A

Servo actuators

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15
Q

Stabilator can be manually operated below _____ KTS

A

80 Kts

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16
Q

Hydraulic pressure is provided to the servos from
1)
2)
3)

A

1) Primary
2) Utility
3) Emergency

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17
Q

At airspeeds above 80kts the ________ controls stabilator

A

Flight management computer (FMC)

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18
Q

_____ Page will display stabilator position

A

SYS

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19
Q

Stabilator icon will be in ______ on FLT page with man stab on both EUFD

A

White (man mode only)

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20
Q

AUTO STAB FAIL advisory when _____

A

Auto mode fails

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21
Q

AUTO/MAN STAB FAIL caution when _______

A

Auto and manual mode fails

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22
Q

Z axis sets what stabilator mode?

A

Auto mode

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23
Q

White stabilator icon?

A

Manual mode

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24
Q

Yellow with 115 stabilator icon?

A

Manual mode failed, position unknown

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25
Yellow with 90 and ? stabilator icon
Position data not valid, position unknown (defaults to 90 kts)
26
Red with 90 and ? stabilator icon
Position data not valid, TAS exceeds stabilator TAS limit
27
Where is the switch located to manually operate the stabilator or to reset the stabilator to the automatic mode form the manual?
Collective flight control grip in each crew station
28
The stabilator position can be determined in the automatic mode by referring to what page on the MPD?
ENG SYS page
29
The stabilator icon in the manual mode is displayed on what MPD page?
In the manual mode a stabilator icon is displayed on the FLT page.
30
What symbol is placed above the stabilator icon on the FLT page if the MP and FMC cannot determine the position of the stabilator?
A “?” mark.
31
What component allows the crewmember to manually adjust the collective friction
The mechanical friction adjust
32
The ______ station has magnetic station for controls
Pilots
33
5 positions on force trim release switch 1) 2) 3) 4) 5)
1)R- Release 2) AL- Engages and disengages Altitude modes 3) AT- Engages and disengages Attitude hold mode 4) D- Disengages all the hold modes but not magnetic brake 5) C- Center
34
______ switch will immediately release the stability command augmentation system when pressed
FMC Release
35
SAS saturation force trim release for ______
3 sec
36
FMC Release button will "dump" all ______
SCAS settings
37
The force trim may be selected on or off using what MPD page
A/C UTIL
38
What are the five positions of the force trim switch located on the cyclic in each crew station?
R, AT, AL, D, center
39
The FMC (flight management computer) commands position of flight controls based on 4 things
- EGI -HADS - Radar Altimeter - Pressure sensor
40
SCAS ____ % all axis ______ % of forward ______ % of BUCS
10% 20% forward 100% BUCS
41
Attitude Hold mode holds what ____
Heading Position Velocity Attitude
42
Altitude hold mode holds what
Radar Altitude Hold Barometric Altitude Hold
43
What component monitors the ARDD through the RVDT?
FMC
44
The FMC perform the monitoring and Fault Detection/Fault Isolation for what two systems?
Electronic Flight Controls and Stabilator
45
FMC provides ____
Stability augmentation system (SAS) and a command augmentation system (CAS) and hold modes
46
SAS reduces _______
crew work load by providing rate damping in pitch, roll, and yaw
47
CAS
Command augmentation system
48
Radar altimeter engagement parameters _____ AGL and _____ kTS
0-1428 AGL <40Kts
49
Barometric altitude hold parameters ______ or airspeed above ______kts
>1428AGL > 40KTS
50
Altitude hold automatically disengages when ______
-Pilot moves collective more than .50" -NR >104% -NR <97% -Torque >100% -TGT exceeds 879 deg.
51
TRC
Translational Rate Command- Used to reposition aircraft without going back to normal position without interrupting force trim
52
Criteria for TRC
-Altitude Hold engaged -Attitude Hold engaged -Altitude 5ft AGL -Cyclic displaced more than .25" -Force trim NOT interrupted -Less than 5KTS
53
TRC disengaged
-TRIM released or interrupted -Exceed 7Kts ground speed -<5ft AGL -ALT HOLD disengaged
54
What is attitude hold designed to accomplish?
Maintain the helicopter in a constant attitude
55
How do you re-center the SAS from the Crew station?
Press and hold the force trim in the “R” position for 3 seconds
56
What are the three functions of the SCAS?
Stability augmentation, Command augmentation , Hold
57
The BUCS is an emergency fly-by-wire backup control system the permits continued flight in the event of what two causes?
Jam Severance
58
What component provides the means to physically disconnect a flight control from it's associated linkage?
ARDD
58
What is purpose of the LVDT?
Translate control motion into electrical signal
59
What three hydraulics have an impact on the hydraulic servos?
-Primary -Utility -Utility Accumulator
60
Failure of the primary hydraulic system will have what effect on the flight controls system?
Loss of FMC inputs SCAS (SAS, CAS, and BUCS)
61
What component implements PBIT, CBOT, IBIT for the flight controls?
FMC
62
What two types of IBIT can be ran on flight controls?
Preflight Maintenance
63
What are the 5 BUCS FAIL cautions associated with the flight controls?
BUCS FAIL BUCS FAIL P BUCS FAIL Y BUCS FAIL C BUCS FAIL R
64
What is the difference between a flight control advisory audio for hold mode and hold mode failure?
NONE
65
ATTITUDE hold mode
-Heading -Position (below 5kts) -Velocity (5kts-40 accel) (30-5 decel) -Attitude (40-Vne accel) (Vne-30 decel)
66
ALTITUDE hold mode
-Radar -Barometric
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