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Systems Flashcards

1
Q

What wil Happen if the helicopter is shut down with one of its tail rotor cables disconnected?

A

The other will disconnect as well, leaving the blades in a fixed pitch

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2
Q

What is the cant of the Tail rotor and how much lift does it provide?

A

20deg
2.5%

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3
Q

Functions of the HMU

A

PMCANVDTO
Pumps fuel at a high pressure
Meters fuel to the ODV
Collective pitch compensation
Accel/deccel limiting (comp stalls/flameout)
Ng limiting
Variable Geometry
DEC/EDECU lockout over ride
Torque motor to trim NG
Opens Vapor Vent

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4
Q

What is significant about the outer loop?

A

The outer loop is controlled by the #2 FCC and controls trim. Has 100% Authority of the flight controls at the rate of 10% per second

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5
Q

How is DC power Obtained?

A

Batteries
DC Converters (2)

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6
Q

What Axes Have boost?

A

Collective, Pitch, Yaw

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7
Q

Hot Start Prevention

A

Will Abort start @900C as long as NG<60, NP<50

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8
Q

What are the minimum Parking Requirements

A

Gust Lock/Rotor Brake
Parking Brake
Tailwheel Locked
Wheels Chalked

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9
Q

Which axes have trim?

A

Collective
Pitch
Roll
Yaw

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10
Q

Functions of the ODV

A

HOPS
Hot start prevention
Overspeed prevention
Purges fuel
Sequences Fuel (PFHLO)

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11
Q

3 Windings of the Alternator

A

NID
NG signal to the cockpit
Ignition power to the exciters
Dec power

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12
Q

How much PSI does the pitch trim servo require?

A

1000PSI

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13
Q

How long can you fly with a GEN BRG caution?

A

up to 10 HRS

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14
Q

What does a T/R Quad Caution indicate?

A

One/both of the T/R cables have failed

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15
Q

Functions not available in lockout

A

TGT Limiting
Isochronus NP governing
Np reference (INCR/DECR)
Torque matching/load sharing

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16
Q

What Computes Heading, Altitude, Turn Rate

A

EGI

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17
Q

What does HYD pump 2 supply?

A

Pilot assist module, Primary Servo 2

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18
Q

How much pressure does the HYD system supply?

A

3000PSI

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19
Q

When do Engine Anti-Ice advisories appear?

A

Engine Anti-Ice on
Low power settings
Electrical failure

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20
Q

What Busses are powered with only the battery switches on?

A

Battery Bus
Battery Utility Bus
DC Essential Bus

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21
Q

When does the APU ACCUM LOW advisory appear?

A

<2600PSI

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22
Q

When can heading be coupled on the FDDCP?

A

> 50KIAS

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23
Q

When does the impending bypass pop on the pilot assist module?

A

1375PSI

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24
Q

What must be on for FPS to work

A

SAS, Boost, Trim

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25
What does SAS provide? What axes?
SAS Provides dynamic stability with short term rate dampening Pitch, Roll, Yaw
26
What does the backup pump supply?
Everything APU Accumulator #2 T/R Servo
27
What happens if there is a leak in the APU accumulator?
if it is >1.5GPM a velocity fuse will close the line
28
What should you do if the APU fails?
Check BITE codes
29
What type of rotor systems are on the UH-60?
Main- Fully Articulated (Lead, Lag, Flap, Feather) Tail- Rigid
30
How can vertical speed be coupled?
>50KIAS, 0-2000FPM
31
What does HYD pump 1 supply?
Primary servo 1 T/R servo 1
32
Why cant both stages of the primary servo's be isolated at the same time?
Electrical interlock
33
What type of bearings are used in the main rotor system?
Elastomeric Bearings
34
When must inlet anti-Ice come on?
<4deg C- MUST 4-13 - MAY >13 - WILL NOT
35
Radio Locations
#1 ARC 201 - Under Co-pilot Seat #2 ARC 231-Nose #3 ARC 231-Aft Avionics bay #4 ARC 201- Aft Avionics bay
36
When will a RSVR LOW caution appear?
60% of fluid remaining
37
How are the HYD pumps driven?
1&2 - Accessory Modules Backup- AC Motor
38
What does Go-Around mode provide?
750 fpm clim @ 70KIAS
39
What Switch is located on the #1 Accessory Module?
Oil Pressure- will illuminate @ 14PSI +/- 2
40
Where can you not extenguish a fire if you have no A/C power?
#2 Engine bay
41
What Will cause you to switch from a 10min TGT limit to 2.5 min with an EDECU?
3% difference in NP VS reference <96%NP >5% per second NP drop Below 50% Q Engine out
42
Equiptment avialible w/ battery power only
basically everything on #2 side
43
When can airspeed be coupled on the FDDCP?
50-150 KIAS
44
What sensor is located on the #2 Accesory module?
NR
45
How many fire detectors are on the aircraft?
5
46
When will inlet anti-ice advisories appear?
93degC in inlet
47
What is significant about the inner loop?
The inner loop is controlled by both FCC's, controls the SAS and only has 10% authority of the controls
48
Functions of the MMU
Collective to pitch Counteracts downwash on the stabilator Collective to roll Counteracts translating tendency Collective to yaw Counteracts anti-torque Yaw to Pitch Counteracts the lift of the tail rotor Collective to airspeed to yaw Decreases as airspeed increases (0-40 Max, 40-100 decreases, >100 no mixing)
49
What 5 lights turn on the backup pump?
HYD Pump 1 LOW HYD Pump 1 Fail T/R Servo 1 Fail HYD pump 2 Fail APU Accumulator low
50
Where does the APU get its Fuel from
#1 Fuel cell
51
What system processes airspeed and Altitude?
ADC's
52
Functions of the DEC
INFLTHHOT Isochronus NP governing(keeps NP@ Reference) NP reference(INCR/DECR) Fault codes Load sharing/Q matching TGT limiting Hot start prevention History counter Overspeed prevention Transient droop compensation
53
How long is emergency power applied?
15 mins day 12 mins night
54
How many filters are on each pump? When do the Bypasses pop?
2- Pressure and return 70+/- 10 PSI over normal
55
How many bleed ports are on the engine?
3- Anti-ice start bleed valve & Pneumatic system
56
What does FPS provide? In which axes?
FPS provides basic autopilot when coupled with trim <50KIAS Heading hold >50KIAS Heading hold & Turn Coordination Pitch Roll Yaw
57
How much is MTA reduced with engine anti-ice on?
20% off the top
58
What is the "Muscle" for trim
Electromechanical actuators Collective Roll Yaw Hydroelectromechanical actuator Pitch
59
What happens if both T/R cables fail?
The tail rotor becomes fixed pitch @ 10.5deg
60
What are the 5 transmission modules?
Main Transmission 2 input modules 2 accessory modules
61
What is attached to the accesory modules?
HYD Pump Main Generator
62
How are the main generators cooled?
Transmission oil
63
What fire extenguisher must be used if there is no AC power?
Reserve
64
When must a fuel sample be done?
First flight of the day 4 hrs after refuel Suspected contamination
65
How long does it take the backup pump to turn on?
3-5 sec with APU generator .5 sec with main generator
66
What are the 5 subsystems of AFCS
SAS Trim FPS Stabilator Coupled flight director
67
What limitations are there if the APU is the only source of AC power?
The backup pump and windshield de-ice can not be on at the same time
68
How much is MTA decreased if the heater is on?
5% , 7.5% with aux heater
69
What type of current is the primary source of power?
AC
70
What are the 4 sections of the engine?
Hot, Cold, Power turbine(NP), Accessory
71
What controls the trim?
FCC #2
72
What does ILS decel provide?
Deceleration on course/glideslope to 70KIAS @200'
73
When can RALT be coupled?
0-1500'AGL
74
When does TGT limiting not work?
Lockout Compressor stalls Engine starts
75
Purpose of the Stabilator?
Provide static and dynamic stability in the pitch axis. SCALP Streamlines rotor downwash Collective coupling Angle of incidence Lateral sideslip Pitch rate feedback
76
Methods of refuel
Pressure 359gal, 300gpm @55PSI Closed Circuit 357gal, 110gpm@15PSI Gravity 360gal
77
Radio antenna locations
#1 Whip on tail pylon #2 bottom of tail #3 top next to satcom #4 tail pylon
78
What are the 3 functions of trim?
Force Gradient Muscle for trim Electronic coupling

UH-60 (10 decks)

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