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U-28 > Electrical System (CSG) > Flashcards

Electrical System (CSG) Flashcards

1
Q

Electrical System

What are the electrical power generating sources on the U-28 Trainer?

A

Battery, Gen 1, Gen 2, EPS Battery

AOH Vol 2, Section 15

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2
Q

Electrical System

During flight, the BUS TIE is normally _______ (closed/open) and the GEN 2 TIE is normally _______ (closed/open)?

A

Closed, Open

AOH Vol 2, Section 15

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3
Q

Electrical System

What buses does GEN 1 normally power?

A

Gen 1, AV 1 and 2, Battery, non-essential, power line

AOH Vol 2, Section 15

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4
Q

Electrical System

What does the MASTER POWER switch do?

A

Enables all electrical power (except EPS batt) to be switched OFF

AOH Vol 2, Section 15

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5
Q

Electrical System

What bus powers the STBY BUS when power is first applied (Engine not running)?

A

Battery Direct

AOH Vol 2, Section 15

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6
Q

Electrical System

What items are on the Battery DIRECT bus?

A

Clock, 50% dome light, cargo door motor, Baggage comp light, Standby Bus

AOH Vol 2, Section 15

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7
Q

Electrical System

The Emergency Power System (EPS) battery provides power to the _________________ for approximately _____ minutes after loss of all other electrical power?

A

Pilot and Copilot standby instruments and associated lighting, 30

AOH Vol 2, Section 15

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8
Q

Electrical System

When testing the EPS battery, hold the test switch for _____ seconds. What status does the green light indicate?

A

3 seconds, EPS is properly charged (80% of rated capacity)

AOH Vol 2, Section 15

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9
Q

Electrical System

Minimum main battery voltage for engine start is _______ volts.

A

24

AOH Vol 1, Chapter 2

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10
Q

Electrical System

When the BATTERY CAWS illuminates, what condition(s) exist?

A

Amp draw more than 60, or overvoltage

AOH Vol 1, Chapter 3

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11
Q

Electrical System

In the case of an engine failure or double generator failure the 26V Lithium Ion battery will supply essential electrical systems for at least ____ minutes if the load is reduced below ____ amps.

A

30, 80

Engineer Assessment from test data

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12
Q

Electrical System

With the STBY switch in the OFF position, what bus provides power to the STBY
bus?

A

AV 1

AOH Vol 2, Section 15

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13
Q

Electrical System

IAW AOH Vol 1, Chapter 2 Normal Procedures, when external power (GPU) is connected, VDC should be between _____ and _____ volts. The external power control unit on the aircraft will disconnect the GPU if the output voltage is less than ______ VDC or greater than ______ VDC.

A

27, 29.5, 25, 29.5

AOH Vol 2, Section 15

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14
Q

Electrical System

Generator #1 is rated at _______ AMPS and can extend to _____ AMPS for 2
minutes.

A

400, 470

AOH Vol 1, Chapter 5

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15
Q

Electrical System

Generator #2 is rated at _______ AMPS with a max desired load of ______ AMPS

A

115, 90

AOH Vol 1, Chapters 2 and 5

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16
Q

Electrical System

If Generator #1 goes off-line, the ______________ bus will be auto-shed.

A

Non-Essential

AOH Vol 1, Chapter 3

17
Q

Electrical System

(T/F) After any generator failure, do not fly in icing conditions.

A

True

AOH Vol 1, Chapter 3

18
Q

Electrical System

(T/F) After a GEN 1 failure that does not reset, landing gear will need to be lowered
via the Landing Gear Emergency Extension procedure.

A

True

AOH Vol 1, Chapter 3

19
Q

Electrical System

The AP, Wx Radar, EGPWS, TCAS, FMS, and GNS-430 #2 receive power from the
_________ bus.

A

AV 2

AOH Vol 1, Chapter 3

20
Q

Electrical System

When the CAWS AVIONICS BUS WARNING and voice callout are heard, the
affected Avionics bus voltage has dropped below ________ volts.

A

22

AOH Vol 1, Chapter 3

21
Q

Electrical System

What does the NON ESS OVRD switch do?

A

Switches power supply to NESNTL Bus from Gen 1 to Battery

AOH Vol 2, Section 15

22
Q

Electrical System

What does the inverter switch do and what systems need AC power?

A

Switches AC inverter pwr supply between Gen 1 bus and Batt bus; synchro references-avionics: AP, EFIS, Nav Conv, AHRS

AOH Vol 2, Section 15

23
Q

Electrical System

In the U-28A Trainer aircraft, what items are on the Mission Bus?

A

PRC Radio, Aft Audio Control Panels

AOH Vol 2, Section 15

24
Q

Electrical System

If the BUS TIE and N ESNTL BUS CAWS lights illuminate, the Bat Power Bus has demanded more than ______ Amps across the bus tie.

A

220

AOH Vol 1, Chapter 3

25
Q

Electrical System

What items are on the Power Line Bus?

A

Flaps, Hydraulic pump, VCCS, WS heat and probes de-ice

AOH Vol 2, Section 15

26
Q

Electrical System

List some items that are lost when the CAWS ESNTL BUS light illuminates with voice callout “Warning, Essential Bus Battery” ___________________________

A

Aileron Trim,
Air/Ground System,
AOA plate heat,
ECS,
Engine Start,
Fire Detect,
LH fuel pump,
ICS,
Fuel Quantity (analog),
RH Landing light,
Wing inspection light,
Main Pitch Trim,
Prop Fx,
Stick pusher

U-28 (19 decks)

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