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T-45 Goshawk > NATOPS - Electrical and Lighting > Flashcards

NATOPS - Electrical and Lighting Flashcards

1
Q

What is the generator rated at?

A

28 Vdc, 9kw

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2
Q

What provides AC power and what are they rated at?

A

Two static inverters; single phase 115 Vac/400 Hz and 26 Vac/400 Hz

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3
Q

How many batteries are there and what are they rated at?

A

Two 24 Vdc, 18 amp-hour

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4
Q

What are the batteries functions?

A

Engine starting system, and following generator failure, power for essential services

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5
Q

What should external power units be rated for?

A

28 Vdc, 300 Amps

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6
Q

What bus is the generator directly connected to and what bus does it feed?

A

28 Vdc generator bus which is connected through diodes to the 28 Vdc essential services bus

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7
Q

When should the “GENERATOR” warning extinguish

A

When a suitable dc output is obtained. May not come online until the 70% checks

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8
Q

***Does the Generator automatically come back online after an airstart?

A

No. The generator is automatically de-energized to reduce engine loads during the airstart and must be manually reset.

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9
Q

What does the under-voltage sensing unit do?

A

Illuminates the GENERATOR warning light when an under-voltage condition is sensed (less than 25 Vdc) and sheds non-essential AC buses. Incorporates a 1.5 second delay

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10
Q

***What does the over-voltage sensing unit do?

A

Takes the generator off line if the voltage exceeds 30.2 Vdc. The undervoltage unit senses that the generator is offline and illuminates the GENERATOR warning light

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11
Q

Which components operate for two minutes after the loss of the generator?

A

DEU, both left MFDs, SADS, VCR/CEU

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12
Q

What type of batteries are used?

A

sealed lead acid batteries

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13
Q

How long should a single, fully charged battery supply the essential services bus? both?

A

12 minutes; 27 minutes

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14
Q

What loads are automatically shed if the generator fails?

A

All loads on the 28 Vdc generator bus, 26 Vac non-essential bus, 115 Vac non-essential bus, and those shed after 2 minutes on the 28 Vdc essential services bus (DEU, both left MFDs, SADS, and VCR/CEU)

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15
Q

Where is the external power receptacle?

A

behind an access panel in the right engine air intake

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16
Q

When is external power automatically cut off?

A

As engine rpm exceeds 45% N2

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17
Q

What does the external power monitor do?

A

Monitors external power for proper voltage and disconnects external power if it senses any quality problems

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18
Q

Can the GTS be started with external power?

A

No

19
Q

Where is the external power monitor switch located?

A

In the front cockpit, left sidewall, aft of the pilot services panel

20
Q

Why are the inverters interconnected? And which inverter is the master?

A

The inverters are interconnected for phase control, and the first inverter to sense a satisfactory dc input assumes a master control function over both inverters

21
Q

When do the inverters drop off-line?

A

when power drops below 16+/-1 Vdc the inverters will drop off line. they will come back online when input power is 18+/-1 Vdc. They will also drop offline when frequency output varies from acceptable range.

22
Q

What info is unreliable if both AC inverters fail and do not reset?

A

GINA pitch, roll, and heading info provided to the DDS, YDC, and VOR/ILS/MB receiver. The attitude info display on the HUD and ADI are not affected.

23
Q

***Can you continue to power your left MFD, DEU and SADS, etc after losing the generator?

A

Yes, by using the display power override (reduces battery life to about 16 minutes) located on miscellaneous switches panel aft of the throttle

24
Q

What is the purpose of the power isolation diode?

A

Isolates Generator bus from essential services bus and batteries (load sheds everything on the generator when the generator goes offline)

25
Q

***What will happen if you lose a single inverter?

A

“AC INV” caution
The non-essential AC buses will be shed, but the essential AC buses will continue to be powered
(lose the console lights, formation lights, radar altimeter, VOR/ILS/MB and yaw damper)

26
Q

***What is the main generator fuse rated at?

A

300 Amps

27
Q

What switches and indications are on the power panel?

A

BATT 1, BATT 2, AC RESET (1&2), GEN switch, and voltmeter

28
Q

What powers the refueling panel?

A

Opening the refueling door moves a switch to power the refueling panel through the No. 1 battery/ground service bus

29
Q

What are some components that require both DC and AC power?

A

GINA, TACAN, DEU, etc.

30
Q

What does the PCL instruct you to do if you get an AC INV light in flight that will not clear?

A

Maintain VMC and land as soon as practicable

31
Q

Can a weak battery affect the ability to reset the generator?

A

Yes (You can move each battery switch to OFF to check each battery individually and determine which one is weak, and then disconnect that battery and try resetting the generator again)

32
Q

How long will the standby gyro continue to operate when power to it is lost?

A

A minimum of 9 minutes even though the OFF flag is in view

33
Q

What are the primary interior lights?

A

Integral lights in the main instrument panel (MIP) and console

34
Q

What are the secondary interior lights?

A

Map lights and strip mounted flood lights under the glareshield and above the consoles

35
Q

What emergency lights are provided?

A

A dedicated lamp in each strip floodlight (not used during normal operation) and integral lights in the standby attitude indicator and compas

36
Q

When are the emergency lights activated?

A

Automatically when MIP or CONSOLE lighting control knobs are out of the OFF position two of the lighting functions fail (MIP and console; MIP and flood; or console and flood)

37
Q

How do you reset the WARN/CAUT lights to day if previously dimmed?

A

MIP knob must be set to OFF

38
Q

Which switches control the NAV lights?

A

NAV, WING, TAIL, and External lights master switch (pinky switch)

39
Q

How are the approach lights controlled?

A

By the AOA system. They function when the gear is down and locked in flight. Day/night operation is determined by the MIP knob in the FWD cockpit. If the HOOK BYP switch is set to CARRIER, the approach lights will flash if the hook is not down.

40
Q

Which anti-collision light is turned off depending on landing gear position?

A

The lower red anti-collision light is turned off when the landing gear is down and locked.

41
Q

***What has the highest amperage draw on the essential bus that should be turned off if possible following a generator failure to conserve the battery?

A

Pitot heat (20 amps)

42
Q

***What bus powers the igniters?

A

28 Vdc essential services bus

43
Q

***What will happen if you have a dual inverter failure?

A

“AC INV” caution (master alert and tone)
Loss all AC services
Pitch, roll, and heading info provided to the DDS and YDC will be unreliable

T-45 Goshawk (21 decks)

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