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T-1A Systems 2 > Electrical System > Flashcards

Electrical System Flashcards

1
Q

What are the DC power sources?

A

Main aircraft battery, GPU (external power), starter/generator

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2
Q

Where is the main battery located?

A

The aft fuselage compartment

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3
Q

What type is the main battery?

A

24 Volt DC, lead acid, 40 Amp-hr

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4
Q

What is the minimum voltage for a battery start?

A

22 volts

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5
Q

What does the battery provide power for?

A

Ground operations, engine start, emergency power

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6
Q

According to the DASH-1, external power (GPU) must provide how many volts and amps?

A

28-28.5 volts DC and 1000-1500 amps

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7
Q

Can the main battery supply power to all the buses and both inverters?

A

Yes

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8
Q

Where is the external power receptacle located?

A

lower left fuselage

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9
Q

What is a RCCB?

A

A specific CB not readily accessible to the pilot

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10
Q

What minimum N2 is needed for a functioning generator?

A

58%

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11
Q

What is the definition of an electrical bus?

A

connects electrical components in AC or DC lines

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12
Q

What is the output of the generators?

A

28 Volts DC, 400 Amp

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13
Q

What does the GCU (generator control unit) do?

A

provides regulation, control, and protection (allows generators to operate in parallel and share the load)

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14
Q

Where is the standby power switch located?

A

Copilots instrument panel

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15
Q

What are the max amps on the ground for each generator?

A

280 Amps

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16
Q

What is the max amps with both generators operating up to 41,000 feet?

A

280 Amps, each generator

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17
Q

What are the max amps with one generator operating up to 32,500 feet?

A

400 Amps

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18
Q

What are the max amps with one generator operating from 32,500 to 41,000 feet?

A

280 Amps

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19
Q

What minimum N2 is required for each generator to work?

A

58%

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20
Q

The standby bus is normally powered by the_______?

A

LH Load Bus

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21
Q

Where is the standby battery located?

A

24 Volt DC in the nose compartment

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22
Q

The standby battery is capable of powering which bus/buses?

A

Standby battery only

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23
Q

Under what conditions will the amber ON indication illuminate on the standby power switch light?

A

The standby battery is the only source powering the standby bus.

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24
Q

What aircraft equipment does the standby bus distribute power to?

A

Standby altimeter, standby attitude indicator, copilots instrument light power supply, UHF radio, engine EFC start, NO. 1 ITT indicator, RTU 1

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25
Q

What are the position of the master gen switches?

A

NORM and EMER

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26
Q

What are the AC power sources & where are they located?

A

2 inverters, 26 VAC & 115 VAC located in the nose compartment

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27
Q

What are the positions of the INV SEL switch?

A

NO 1, AUTO, NO 2

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28
Q

Where should the inverter voltage select switch normally be?

A

NO 1 INV, 115 VAC

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29
Q

What normally powers the NO 1 Inverter?

A

The LH load bus

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30
Q

Upon what conditions will the AC bus shed relay open?

A

When both:
-NO 2 inverter is powering the primary buses
AND
-NO2 inverter is being powered by the emergency bus

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31
Q

Normally, what powers the secondary AC buses?

A

The NO 2 inverter

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32
Q

Normally, how does the emergency bus receive power?

A

Through the emergency bus power feed line through the aircraft generators.

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33
Q

What happens if the battery switch is moved to the EMER position?

A

The main battery powers the emergency bus

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34
Q

What light illuminates if the third feeder line is active?

A

L or R BUS FDR FAIL, along with the Master Caution light

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35
Q

What provides a connection for all DC power?

A

The battery charge bus

36
Q

What is the max operating load for single generator operation at FL200?

A

400 Amps

37
Q

What kind of CBs protect the non-essential buses and radio masters?

A

switch CB’s

38
Q

During the battery feed test with the battery switch in EMER, which of the following AC-assosicated annunciators should illuminate?

A

INV 1 FAIL and AC BUS SHED

39
Q

What are the landing light limitations?

A

Do not extend: over 200 KIAS, or above 20,000 ft MSL

40
Q

With the INV SEL switch in the NO 2 position, what does the #2 inverter power?

A

The primary AC buses & shed buses (primary buses only if powered by the emergency bus)

41
Q

What does the ROTAT BCN switch control?

A

One red, rotating beacon light located on the tail

42
Q

What lights are controlled by the NAV switch?

A

Navigation lights: one red on the left wing, one green on right wing, and one steady white light on the tail

43
Q

What does the ANTI COLL panel switch control?

A

Three white, flashing anti-collision (strobe) lights, one in each wingtip and on the aft most point of the tail

44
Q

What are the R and L wing inspection lights for and where are they located?

A

Inspecting wings for icing conditions, located on each side of the aircraft just forward of the wing root

45
Q

How can you extend the landing lights with the gear up?

A

cycle the landing lights switches to RET/OFF and back to EXT/ON

46
Q

When should the cabin general area floodlights automatically extinguish?

A

When the general area fluorescent lights illuminate, or when the aircraft is airborne

47
Q

To arm the instrument floodlights for automatic operation, place the:_____

A

integral switch to the INTEG position

48
Q

What will happen if the Integral Switch is in the INTEG position and the left load bus loses power?

A

Emergency lights will illuminate automatically

49
Q

What happens when you test the emergency lights?

A

4 cabin lights come on (2 general are floodlights & 2 emergency exit lights), EMER LT NO ARM annunciator illuminates on the shroud panel

50
Q

What powers the cabin emergency lights?

A

4 independent batteries

51
Q

What kind of circuit breaker protects the LH and RH radio buses?

A

switch type circuit breakers

52
Q

What are the three types of circuit breakers?

A

Remote Control Circuit Breaker (RCCB), Push-pull, Switch CB’s

53
Q

What are the single generator failure indications?

A

MASTER CAUTION RESET and L or R GEN OFF annunciators, bad generator has zero volts/amps, good generator has slightly increased amps

54
Q

How is the emergency light system controlled?

A

By a guarded switch on the overhead panel

55
Q

What does illumination of the BATTERY FDR FAIL light indicate?

A

A ground fault, a feeder problem, or a battery feeder protection unit problem

56
Q

What happens if you turn the battery off with a BATTERY FDR FAIL light?

A

Battery relay opens and the battery won’t charge

57
Q

With a dual generator failure, how many amps should you see on the gauges?

A

0 Amps

58
Q

What systems are lost with a single-generator failure?

A

None

59
Q

What is powering the emergency bus if the EMER BUS FDR FAIL annunciator is illuminated and the CB is popped?

A

LH Load Bus through the EMER BUS-TIE relay

60
Q

What does an illuminated BATT CUT OFF annunciator indicate?

A

Battery relay is open, no battery charging occurs, battery switch is in off or emer and electrical power is being supplied by one or both generators

61
Q

When does the L or R BUS FDR FAIL light illuminate?

A

When feeder 3 (the “standby” feeder) is powered, indicating at least one of the other feed lines has failed

62
Q

When does the EMER BUS FDR FAIL annunciator illuminate?

A

When the emergency bus power relay or the emergency feed RCCB opens and generator or battery power is not being fed through the emergency bus feeder line

63
Q

What is the primary indication of an emergency bus feeder failure?

A

EMER BUS FDR FAIL annunciator

64
Q

What is the 2nd indication of the emergency bus feeder failure?

A

Open CB

65
Q

What hydraulic powered systems are affected when operating on EMER or STBY power only?

A

Normal gear extension, flaps, speed brake, anti-skid

66
Q

What is the 1st step of the electrical fire checklist?

A

Oxygen masks-DON
THEN
ENSURE FUEL XFEED switch is in the normal position to prevent possible reduction in thrust

67
Q

Can you reset FDR Bus CB’s?

A

NO

68
Q

Where is the cabin smoke detector located?

A

Aft portion of the cabin

69
Q

What comm/nav systems are powered by the standby bus?

A

RTU 1 and UHF radio

70
Q

With a failure of the #1 inverter, what does the #2 inverter do?

A

Powers primary and shed buses

71
Q

On the ground, what is the max allowable load on the operating generator?

A

280 Amps

72
Q

What allows the generators to operate in parallel & share the electrical load?

A

The generator control unit (GCU)

73
Q

How many bus feeders between the main & load buses are normally powered?

A

2

74
Q

When operating on the EMER & STBY Buses, what trim systems are available?

A

EMER Pitch trim on the emergency bus

75
Q

With the LDG lights extended and illuminated, if gear is then retracted, will the LDG lights retract automatically?

A

Yes

76
Q

What controls the T-1A emergency lighting system?

A

The guarded EMER LT switch on the overhead panel

77
Q

During flight, you observe a MASTER CAUTION RESET annunciator and INV 1 FAIL. What is the first thing you should do?

A

Check the respective circuit breaker

78
Q

If the # 1 inverter fails, what will the #2 inverter power?

A

The primary AC buses

79
Q

What does illumination of the Battery FDR FAIL light only indicate?

A

Battery feeder protection unit has failed or lost power

80
Q

What does illumination of the Battery FDR FAIL light, EMER BUS FDR FAIL light, and MASTER CAUTION indicate?

A

Emergency bus feeder has lost power or the emergency bus feeder RCCB has popped

81
Q

What does illumination of the Battery FDR FAIL light, EMER BUS FDR FAIL light, BATT CUT OFF and MASTER CAUTION light indicate?

A

The battery tie-in relay has opened and the emergency bus feed line has lost power. This might occur if the battery feeder protection unit has opened the relays because of a battery ground fault

82
Q

If the EMER BUS FDR FAIl annunciator illuminates and it sCB is open what is powering the emergency bus?

A

the LH load bus (if it fails, the emergency bus will be lost)

83
Q

When performing the ELECTRICAL FIRE checklist, which buses are powered when the Gen switch is in EMER and the Bat switch is off?

A

STBY bus only

84
Q

Can you reset a BUS FEEDER CB?

A

NOOO

85
Q

What does the BUS FDR FAIL annunciator indicate?

A

the standby feeder (#3) is powered

86
Q

An illuminated AC BUS SHED annunciator on the pilot’s shroud panel indicates the:

A

AC shed buses are de-energized

87
Q

During the battery feed test with the battery switch in EMER< which of the following AC associated annunciators should illuminate?

A

INV 1 FAIL and AC BUS SHED

T-1A Systems 2 (1 decks)

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