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TH-73 > NATOPS prep > Flashcards

NATOPS prep Flashcards

1
Q

which pitot tube provides info to ESIS

A

1 pitot

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2
Q

what info is on ESIS

A

attitude, slip/skid, altitude, airspeed, heading

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3
Q

flight control system type

A

rigid control rod

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4
Q

collective routing

A

collective to torque tube beneath cockpit seats then up left pillar and across to mixing unit. along path is lvdt

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5
Q

cyclic routing

A

cyclic to 2 torque tubes then up right pillar then SAS actuators to mixing unit

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6
Q

pedal routing

A

pedals combine under center console then rods and bellcranks to yaw sas actuator then t/r servo then link in tail boom to pitch change mechanism

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7
Q

3 functions of pitch change levers

A

blade flapping limiter stop
pass pitch change inputs from pitch change links to blades
act as mount for hyd dampers

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8
Q

purpose of chinese weights

A

provide zero pitch return moment to reduce pitch control loads

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9
Q

t/r pitch change names

A

pitch change links connect to crosshead to pitch change horns to blades

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10
Q

how many T/R driveshafts

A

2

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11
Q

DC sys numbers

A

28VDC

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12
Q

AC sys numbers

A

115/26 Vac 400 Hz single phase

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13
Q

how to secure main bus

A

turn off gen sw

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14
Q

CB symbology

A

single block: batt bus
double block: emer bus
nothing: main bus

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15
Q

Battery numbers

A

24V 27Ah NiCd batt
batt hot at 71+-3C

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16
Q

what does GCU control for

A

starter control, voltage reg, overvolt, short circuit protection, reverse current protection

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17
Q

AUX GCU job

A

voltage reg, overvolt, aux bus tie connector, short circuit protec, reverse current protect

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18
Q

EXT pwr voltage requirement

A

28V

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19
Q

what’s the AC sys for

A

VG and SAS actuators

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20
Q

ENG name

A

PT6B-37A

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21
Q

eng type

A

free turbine turboshaft

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22
Q

1 of axial compressors

A

3

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23
Q

how is eng mounted to main frame

A

parallel rod on AGB
tripod of right RGB
bipod on left RGB

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24
Q

when does bleed air valve close for normal ops

A

91%

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25
Q

What does the AGB drive

A

HFSOON
high px fuel pump to fcu
FCU
starter generator
oil px pump
oil scavenge pump
N1 tach gen

26
Q

What is mounted on the AGB

A

POOF FAS
P3 filter
oil filler neck
oil filter
fuel heater
fuel filter
AGB chip det
starter generator

27
Q

where is eng oil tank

A

area between inlet case and AGB

28
Q

what does RGB drive

A

main shaft and tail shaft
N2 mech governor

29
Q

what does RGB provide support for

A

ILINER
internal torquemeter
left/right eng mounts
internal freewheeling unit
N2 speed sensor
ext torque transducer
rgb chip detector

30
Q

what kind of sys is eng oil sys

A

pressurized circulating

31
Q

what does eng oil sys lubricate

A

agb, gas gen section, power section, rgb

32
Q

eng oil cooler bypass numbers

A

80-90 C through cooler
bypass if backpressure is 35-52 psi

33
Q

which chip detector is not burnable

A

AGB

34
Q

oil flow path

A

from tank via px pump to px regulating valve to ext oil filter, to lubricate or cooler then scavenged pump back

35
Q

Inputs to the FCU

A

P3, twist grip position via RVDT, N2 governor

36
Q

biggest difference between EEC and MEC

A

EEC uses LVDT MEC uses in line through mixing unit for collective position

37
Q

rotor high and low numbers

A

108.5 and 96.5

38
Q

when does ITT limit display swap from start to norm

A

51% N1

39
Q

where are eng oil temp and px sensors

A

left lower AGB

40
Q

fuel tank quantities

A

upper 538 lb
lower 265 lb each

41
Q

fuel flow

A

upper tank through flanges to lower cell then through flapper valves to respective pumps through eng oil/fuel heater, then filter assembly then eng driven fuel pump then another pump then fcu to fuel nozzles

42
Q

what is mounted on xmsn

A

1/2 hyd pumps, oil cooler fan, aux gen, rpm sensor

43
Q

what acts as sump of main xmsn

A

xmsn AGB

44
Q

what acts as reservoir for main xmsn

A

upper case

45
Q

where are chip detectors in main xmsn

A

AGB and upper case

46
Q

what kind of oil sys is main xmsn

A

splash and spray type

47
Q

main xmsn oil flow

A

from upper housing to px pump side of dual pump then to external filter then to oil jets, drains to agb sump, scavenge pump side sends it to ext oil cooler then back to bell housing

48
Q

thermostatic bypass on oil cooler numbers

A

bypass begins to close at 54C so more goes to cooler at 78 should be completely closed all oil to cooler

49
Q

where is xmsn oil px sensor

A

xmsn agb

50
Q

where is xmsn oil temp sensor

A

ext oil filter

51
Q

TR gearbox oil sys

A

splash type wet sump

52
Q

which hyd sys boosts tail

A

1

53
Q

where are hyd rservoirs

A

right side cabin roof

54
Q

nominal px of hyd sys

A

1550 psi

55
Q

hyd fluid flow

A

reservoir to pump to filter group to by accumulator to servos back to filter group back to reservoir

56
Q

what differential px do hyd filter pdis pop

A

70 psi

57
Q

when does servo off caution turn on

A

less than 1138+-50 psi

58
Q

when does hyd overperssurization valve relieve

A

1640-1850 psi

59
Q

where are hyd px sensors

A

in px line after filter

60
Q

total number of linear actuators

A

5

61
Q
A

TH-73 (25 decks)

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