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mike Mike > Sys 2 > Flashcards

Sys 2 Flashcards

1
Q

Primary servos

A

Laterl- left
Aft
Fwd

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2
Q

SAS

A

Yaw
Roll
Pitch - box

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3
Q

Boosted controls

A

Collective
Yaw
Pitch

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4
Q

Trim

A

Pitch roll yaw collective

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5
Q

Five cons where backup hydro will come on

A

Res 1 low, hyd pump 1, t/r servo 1, hyd pump 2, apu accum low

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6
Q

Inner loop

A

SAS

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7
Q

Dynamic stability

A

Short term inner loop sas fast response

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8
Q

Outer loop

A

FPS & trim long term full authority static stability

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9
Q

Static stability

A

FPS and trim

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10
Q

How long is the hydraulic logic open? Vs the main AC generator?

A

This valve is held open by the hydraulic logic module for 3 to 5 seconds when either the APU generator or external power is supplying power, or for 0.5 second when the main AC generators are supplying power.

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11
Q

Is ng / Np connected mechanically?

A

No

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12
Q

Np and NR connected mechanically ?

A

Yes

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13
Q

Engine Abort Start Criteria

A

No TGT rise within 45 seconds, No Np1 or Np2 within 45 seconds, No Eng Pressure 1 or 2 within 45 seconds, ENG Starter Caution off before reaching 52% NG, TGT rises above 851 Degrees.

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14
Q

Trim is solely implemented by ?

A

FCC 2

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15
Q

Electromagnetic actuators -3

Electrohydraulic -1

A

3- roll, yaw, collective

1- pitch

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16
Q

Tail rotor

A

cAnted 20*, produces 2.5 % lift

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17
Q

TAIL ROTOR QUAD FAIL

A

Can be one or both cables broken, can tell by adjusting collective

Will work between 25-145 kts and fix pitch at 10.5 fix pitch if both broken

One broke? U good

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18
Q

Main transmission has how many degree fwd tilt?

A

3 degrees

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19
Q

What are the three priorities of power? (Electrical)

A

First Priority – Main Generators. If there is at least one Main Generator operating, with one exception, the APU Generator or the External Power Receptacle will not be able to power the system.

  1. Second Priority – APU Generator. If the APU Generator is operating the External Power Receptacle will not be able to power the system.

Third Priority – External Power Receptacle. A ground power unit (GPU) attached to the External Power Receptacle will only be able to power the aircraft if there are no generators operational.

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20
Q

How is the main generator cooled?

A

Each Main Generator is rated at 30/45 KVA,

is cooled by transmission oil,

and provides 115/200 VAC, 3 phase, 400 Hz power

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21
Q

How is the APU cooled?

A

The APU Generator is rated at 20/23.8 KVA,

is air cooled

and provide 115/200 VAC, 3 phase, 400 Hz power

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22
Q

How many generators does it take to run the blade de ice?

A

Takes two generators

Or APU can run with the help of another generator but not by itself

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23
Q

CHIP L/R INPUT MDL

A

Idle

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24
Q

CHIP L/R ACC MDL

A

LAND ASAP

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25
Q

If you’re just down to battery power how long do you have ?

A

Provide uninterrupted emergency power for 15 minutes (12 minutes at night with the search light on)

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26
Q

GEN 1 and 2 FAIL caution

A

The generator fail cautions do not appear unless AC power is available. The lights are powered by the DC Primary busses.

During run-up, both lights should go off above 97% Nr.

iii. Appears whenever generator output is interrupted.
iv. The other generator will then supply power to all busses.
v. Disappears with a successful generator test.

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27
Q

APU GEN ON

A

Comes on when APU is the sole source of of Ac Pwr

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28
Q

Each generator has a primary and alternate bearing, how many flight hours will the alternative provide if you have a GEN BRG 1/2 FAIL?

A

10, alternate bearing provides

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29
Q

CONV 1 (or 2) FAIL : converter 1 or 2 has no output

A

Do nothing, especially do not turn off the battery switch Or you’ll lose power

Turning No. 1 battery switch off will result in loss of No. 1 BATT Bus and No. 1 DC ESS bus.

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30
Q

AC REF BUS DEGRAD- advisory light

A

Appears when one of the two auto-transformers supplying bus power has failed.

ADVISORY LIGHT, when transformer has failed

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31
Q

dual generator failure

A

will result in loss of all ac powered systems,

Look for ac ref bus degrade In advisory

  1. Airspeed — Adjust (80 KIAS or less).
  2. GENERATORS NO. 1 and NO. 2 switches— RESET; then ON.

If electrical power is not restored:

  1. GENERATORS NO. 1 and NO. 2 switches— OFF.
  2. MCUs and ECS– OFF prior to EMER APU START.
  3. EMER APU START.
  4. LAND AS SOON AS PRACTICABLE.
  5. If APU GEN ON advisory extinguishes, ensure MCUs and ECS – OFF prior to resetting the APU generator.
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32
Q

GEN 1 FAIL or GEN 2 FAIL Caution Appears

A
  1. Affected GENERATORS switch — RESET; then ON.

If caution remains:

  1. Affected GENERATORS switch — OFF.
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33
Q

With a dual converter failure which BUS will not be hot?

A

Primary busses

You only have 15 min left on the battery power and 12 at night

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34
Q

What drives LRUs on accessory gearbox?

A

NG

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35
Q

The HMU operates what part of the compressor section?

A

Variable guide veins

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36
Q

What drives the Accessory Gearbox?

A

Gas generator

37
Q

How does the cockpit receive the Ng signal?

A

Ng wiring if alternator

38
Q

Ng governing is influenced by what input to the HMU?

A

T2 sensor

39
Q

When will TGT Limiting not work?

A

Lockout, compressor stall, start up

40
Q

The MMU is designed to reduce __________________________.

A

Inherent Control Coupling

41
Q

How does the MMU minimize inherent control coupling?

A

By combining, summing, and coupling collective,

pitch, roll and yaw inputs.

42
Q

Why is Collective/Airspeed to Yaw mixing completely phased out when the airspeed is above 100 kts?

A

Due

to the efficiency of the tail rotor and cambered fin.

43
Q

What is the only trim actuator that receives hydraulic power from the number 2 hydraulic system?

A

Pitch

44
Q

HYD LEAK TEST switch allows testing of the ____.

A

Ldi

45
Q

The RSVR 1/2/Backup LOW caution illuminates when?

A

60% fluid remaining

46
Q

The No. 2 hyd. system supplies pressure through the transfer mod to what servos?

A

The second stage

primary servos and the pilot-assist servos.

47
Q

Basic autopilot functions are provided by?

A

Trim- FPS

48
Q

What are the four signals used by the FCC’s to position the Stabilator

A

(Co)llective
(L)ateral
(A)irspeed
(P)itch

49
Q

What are the five basic subsystems that comprise AFCS?

A

Stabilator, Trim, SAS, FPS, and Coupled FD

50
Q

When does SAS 1 and 2 enhance turn coordination?

A

When the FCC compute data at airspeeds above 50 kts

51
Q

When will a heading hold be captured in a hover?

A

When yaw rate reaches zero, not when pedal switches

are engaged

52
Q

What will the FCC’s do if A/S signal is lost?

A

Shut off

53
Q

What are the additional features of AFCS?

A

Heading hold, Pitch and roll hover augmentation/gust alleviation, Turn coordination, Fault detection and annunciations

54
Q

What employs rate damping to improve helicopter stability, 10% control authority, fast in response, and can operate without causing movement of the flight controls?

A

Inner loop ie SAS

55
Q

To attempt to clear AFCS fault indications, the pilot can?

A

Press the illuminated CPTR 1 and/or

CPTR 2 button

56
Q

What does the SAS DEGRADED advisory mean?

A

The SAS pitch, roll, or yaw channel has disengaged

57
Q

What does the STAB DEGRADED advisory mean?

A

The stabilator is in a limited auto mode.

58
Q

The engine driven fuel boost pumps are driven by?

A

Ng part of engine

59
Q

When must pitot heat be turned on?

A

Below 4 degrees and visible moisture pitot heat must be on

60
Q

Conical Elastomeric bearings permit what movements?

A

Flap, lead, lag

61
Q

Cylindrical Elastomeric bearings permit what movements?

A

Provides the pitch change axis

62
Q

Main module chip detector has a _____ time delay to allow fuzz burn to work?

A

30 sec delay

63
Q

The ________ accessory module has a low oil pressure switch and chip detector

A

Left

64
Q

The main transmission may run at cruise flight for _______ with loss of all oil?

A

30 min

65
Q

What range should oil pressure remain steady in to ensure any fluctuations occur they remain in the acceptable range?

A

45 to 60 psi

66
Q

What is used to cool the main transmission oil?

A

Oil cooler fan and the radiator

67
Q

What are the main rotor subsystems?

A

m/r blades, hub, flight controls, bifilar vibration absorber

68
Q

GCU GENERATOR CONTROL UNITS over and under voltage

A

Over voltage: When the generator output voltage rises above limits generator is disabled and disconnected from the system

Under voltage: 85-89% NR

69
Q

The rotor brake system is designed to hold the main and tail rotor system during engine starting, with bothengines at IDLE and to stop the rotors in approximately ___-___ seconds with 150-180 psi applied at 40%NR during engine shutdown.

A

12-18

70
Q

Each arm of the hub assembly is pre-lagged and pre-coned __° to reduce the torque bending movement from the head and reduce vibrations

A

7

71
Q

Does the engine have fuzz burn capability?

A

No

72
Q

The oil temperature sensor is also the chip detector located where?

A

Main module, intermediate module, tail rotor module

73
Q

What are the stabilator function?

A

Streamlines – compensates for rotor downwash ●
Collective coupling – minimize pitch excursions due to collective inputs ●
Angle of Incidence – Angle of Incidence decreases as airspeed increases ●
Lateral Sideslip – Sideslip to pitch coupling to reduce susceptibility to gusts ●
Pitch Rate – pitch rate feedback to dampen pitch excursions ●
Air data computer – Connected to pitot static system

74
Q

The rotor brake solenoid locks the ______________ in the ground idle position through a locking arm linked to the solenoid.

A

EPCLs

75
Q

To know

A

Lockout does not prevent Max Fuel Flow and NG limits.
NP and NR are connected via a one way mechanical connection.
Submerged pumps are not usually used IOT prevent pressurized fuel lines.
T/R Quad Fail with no control signifies both cables have been severed.
If HYD Pump 2 and Back up Pump fail, Pilot assist and #2 primary will be unpressurized.
Pulling down on the PCL will disengage the started.
If the start caution stays on, you’ll have to remove the air source.

76
Q

What happens when an auto transformer fails

A

the AC REF BUS DEGRAD light will appear

77
Q

The engine driven fuel boost pumps are driven by?

A

Ng part of eng

78
Q

Which fuel cell feeds the APU?

A

Number 1 fuel cell

79
Q

Where does power from the slabs go?

A

Battery utility bus (bub), battery bus, DC essential bus

80
Q

The main transmission is made up of ____ modules.

A

Five (Two input modules, the main module, and two accessory modules)

81
Q

FUEL 1 BYPASS or FUEL 2 BYPASS Caution Appears

A

ENG FUEL SYS selector on affected engine — XFD.

  1. LAND AS SOON AS PRACTICABLE.
82
Q

FUEL 1 BYPASS and FUEL 2 BYPASS Cautions Appear.

A

LAND AS SOON AS POSSIBLE.

83
Q

FUEL 1 LOW and FUEL 2 LOW Cautions Appea

A

Land as soon as practicable

84
Q

FUEL 1 PRESS LOW or FUEL 2 PRESS LOW Caution Appear

A

If the caution appears, flameout is possible. Do not make rapid collective movements. Critical situations are those where single engine flight is not possible, and the potential for fire resulting from a fuel leak is secondary to engine flameout.

If the caution appears and the situation is critical:

  1. ENG FUEL SYS selector on affected engine — XFD.
  2. FUEL BOOST PUMP switch on side being used — ON.
  3. LAND AS SOON AS POSSIBLE.
  4. EMER ENG SHUTDOWN after landing.
    b. Non-critical situations are those where single engine flight is possible.
    c. If the caution appears, and the situation is not critical:
  5. ENG FUEL SYS selector on affected engine — XFD.
  6. FUEL BOOST PUMP CONTROL switches — NO. 1 PUMP and NO. 2 PUMP — OFF (As applicable).
  7. LAND AS SOON AS PRACTICABLE.
85
Q

FUEL 1 PRESS LOW and FUEL 2 PRESS LOW Cautions Appear

A
  1. LAND AS SOON AS POSSIBLE.

2. EMER ENG SHUTDOWN after landing

86
Q

Which gearboxes have fuzzburn?

A

All of them, main mod has 30 sec delay

87
Q

Submerged boost pump

A

Normally the aircraft is flown with the pumps off so the fuel lines have a negative pressure going up to the engine driven boost pumps.

This is beneficial because if a fuel line is severed then the engine would be sucking air instead of having a pressurized fuel leak which could possibly lead to a fire.

88
Q

Fuel low caution comes on

A

172lbs left

mike Mike (35 decks)

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