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CRJ900 Mesa CL-65 Study Cards > Mock Oral > Flashcards

Mock Oral Flashcards

1
Q

How would service employees get lights to service the aircraft?

A

External service button on the AC service panel

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2
Q

Where is the AC service panel located?

A

Forward right fuselage

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3
Q

What bus does the AC service switchlight power?

A

AC service bus

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4
Q

What kind of things are on the AC service bus?

A

Lights

Water & waste control

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5
Q

What does the DC service switch get power from and what does it power?

A

APU Battery Direct Bus

Service bus

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6
Q

What does the AC & DC service switches power?

A

AC & DC service buses

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7
Q

Which buses are always powered (hot)?

A

APU Battery Direct Bus
Main Battery Direct Bus
Emergency Bus

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8
Q

What are ways the AC system can be powered?

A

IDG
APU
ADG
AC External Power

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9
Q

What happens when I switch the battery master on?

A

The BATT BUS is powered by the APU Battery Direct Bus & the Main Battery Direct Buses. The DC system is turned on

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10
Q

What other switches on the aircraft can control DC systems?

A

None. The DC system is taken care of by DCPCs

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11
Q

What are the two ways the DC system is powered?

A

Main & APU Batteries

TRUs (this is the long term way it will be powered)

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12
Q

What buses power the TRUs?

A

AC Bus 1
AC Bus 2
AC Bus 2
AC ESS Bus

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13
Q

What controls all of the bus ties?

A

DCPC

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14
Q

In default the cross ties are all ____.

A

Closed because they are all powered by the TRUs.

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15
Q

If AC Bus 1 failed, which tie would open?

A

Main tie

Utility bus would be depowered

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16
Q

The ____ will automatically control the ties to optimize power to the DC system.

A

DCPCs

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17
Q

If we lost all AC power what would happen?

A

ADG would deploy

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18
Q

Would the ADG power the DC system?

A

Yes because the AC ESS Bus is powered, so that TRU will convert it to DC. The ESS tie will connect it to the BATT BUS

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19
Q

AVAIL on the AC Service switchlight means we have the correct voltage, frequency, and phase from

A

The AC external power

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20
Q

What’s the sequence of events on the AC Service switchlight?

A

AVAIL will illuminate when we have the correct voltage, frequency, and phase (115V, 400HZ, 3 Phase). Then you hit the button for the AC external power to become IN USE.

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21
Q

If we had AC External power IN USE and we turn on the APU, what would be powering the airplane?

A

The APU because it’s priority (onside, inside, cross side, outside)

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22
Q

With GEN 1 & the APU on, what is powering what buses?

A

GEN 1 is powering BUS 1 & the APU is powering BUS 2

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23
Q

What are the components of an IDG?

A

Constant speed drive & a generator

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24
Q

When would we press a guarded switchlight?

A

When directed by the QRH

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25
Q

If the IDG FUALT light is on, what has happened to your electrical system?

A

FAULT light means high oil temperature, low oil pressure. Nothing because the IDG hasn’t failed yet, it’s just showing a fault. In order for the IDG to be taken offline, DISC switchlight needs to be depressed

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26
Q

For mechanical shearing of the IDG would you get the DISC light?

A

No. The DISC light means the selected disconnect was successful

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27
Q

ALTN illuminates on AC ESS XFER Switchlight. What does that mean?

A

Per the electrical systems manual, the ESS BUS is now being powered by BUS 2

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28
Q

What is normally powering the AC ESS Bus?

A

BUS 1

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29
Q

What else can power the AC ESS BUS?

A

BUS 2, ADG, External power

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30
Q

What is powered by the ESS BUS? (Same things that ADG powers)

A

Stab trim CH 2
Slats/flaps
HYD System 3

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31
Q

If the FAIL portion of the GEN 1 AUTO XFER switchlight illuminates (the GCU has detected a bus fault or overcurrent) GEN 1-BUS 1 will be isolated from the system. If this happens, is there any way to get BUS 1?

A

The IDG has to be reset by maintenance but Bus 1 can be powered by the APU, GEN 2 & AC external power.

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32
Q

AUTO XFER FAIL switchlight is not illuminated but something on BUS 1 is causing a spark. How would you manually get rid of BUS 1?

A

Press GEN 1 AUTO XFER OFF. This will isolate GEN 1 & Bus 1 from the system

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33
Q

If you select GEN 1 AUTO XFER OFF and decide you want GEN 1 & BUS 1 back online, can you get them back?

A

Yes, because it hasn’t failed, it’s been selected off

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34
Q

Before turning on the APU, you have to do the _____ test.

A

Fire Detection

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35
Q

What type of message is FIRE SYS OK?

A

Advisory

36
Q

How many fire/overheat detection loops are on the plane?

A

Dual loops: 2 Engines, APU (6 loops)
Single loop: 2 MLG Bay (2 loops)
8 loops total

37
Q

Indication of an engine fire?

A

Triple chime
Master warning flasher
EICAS message (L/R engine fire)
ENG FIRE PUSH Switch illuminates

38
Q

What would pushing the ENG FIRE PUSH switch do?

A

Close bleed air, hydraulic, and fuel SOVs
Arm the squibs
Take the generator offline

39
Q

5 seconds later, if the engine fire indication is still there, do what?

A

Hit the BOTTLE ARMED PUSH TO DISCHARGE for the associated engine

40
Q

If that bottle didn’t put the fire out, can you use the other bottle on the same engine?

A

Yes. When you press the ENGINE FIRE PUSH switchlight, this indicates to the system which engine is on fire, and the bottles will be discharged into this engine

41
Q

Running APU on the ground and it catches on fire, what would happen?

A

Fire bell, master warning flashers, APU FIRE PUSH switchlight will come on. APU would be taken offline, after 5 seconds, if fire is still there after shutting the APU down, bottle will automatically discharge. If the fire goes away after the APU shuts down, it will not discharge the bottle.

42
Q

How many bottles are there for the APU?

A

1 bottle

43
Q

How many cargo bottles are there?

A

2

44
Q

If the FWD CARGO SMOKE PUSH switchlight illuminates and we push the BOTTLE ARMED PUSH TO DISCHARGE switchlight, what will happen?

A

2 bottles will be discharged into the FWD cargo compartment

45
Q

Pushing the AFT CARGO SMOKE PUSH switchlight will

A

Arm the squibs

Shuts the recirculation valves

46
Q

Why do the B pumps kick in when the flaps are out of zero?

A

The system knows you’re about to takeoff or land. Need hydraulics for gear

47
Q

When would you get a HI HYD TEMP EICAS message?

A

96 degrees C

48
Q

What HYD system operates inboard brakes?

A

HYD system 3

49
Q

What HYD system operates outboard brakes?

A

HYD system 2

50
Q

What cools the HYD system 1 & 2?

A

RAM air/oil heat exchanger (oil here means HYD fluid)

51
Q

What cools HYD system 3?

A

It is not near anything critical like an engine or fuel so it just cools down on its own.

52
Q

What HYD system powers alternate gear extension?

A

HYD system 2 (MLG AUX ACT)

53
Q

How do we make HYD system 2 drive the alternate landing gear down?

A

LG PULL lever

54
Q

Speed limit on alternate landing gear extension?

A

220 KTS

55
Q

We lose HYD system 3 and manually extend the landing gear using the lever and HYD system 2. We land and want to taxi off the runway. Will we be able to?

A

No, because N/W STEER is on HYD system 3 which has failed

56
Q

How many fuel pumps are in the fuel system?

A 
6. 
2 engine driven pumps (invisible on SYN)
2 boost pumps
Crossflow pump
APU pump
57
Q

How many ejector pumps are there in the fuel system?

A

8 (only 6 depicted on SYN)
2 transfer
4 scavenge
2 main

58
Q

What would the normal configuration of the fuel panel look like? What lights would be on normally?

A

None.

59
Q

How does AUTO XFLOW work?

A

When the system detects an imbalance of 200 lbs it’s going to automatically direct fuel into the low tank until its balanced +50 lbs

60
Q

If AUTO XFLOW failed, when would you select a different mode?

A

When directed by the QRH

61
Q

If the QRH directed you to try MAN mode, how would you do that?

A

Hit MAN XFLOW AUTO OVERRIDE switchlight then the L or R button depending on which tank you want fuel to flow into

62
Q

When would MAN XFLOW turn off?

A

You have to turn it off yourself so you have to watch quantity

63
Q

What happens during GRAVITY XFLOW?

A

Gravity crossflow valve opens and allows the system to balance itself out.

64
Q

How do we select GRAVITY XFLOW?

A

Hit the OPEN switchlight

65
Q

What if you open the valve and everything is balanced and looking good, and you hit the button again to close the valve and you get a FAIL light?

A

The valve is not in the commanded position

66
Q

Pushing the L or R BOOST PUMP switchlight does what?

A

Arms the boost pumps

67
Q

When in normal operations would you push the BOOST PUMP switchlights?

A

To start the engines

68
Q

After starting engines, BOOST PUMPS are only needed to back up the main ejector. Will the BOOST PUMP switchlight say ON at this point?

A

No, it will only be armed, not ON because the main ejectors are outputting enough fuel pressure

69
Q

When would you get an EICAS message that says AUTO XFLOW INHIBIT?

A

When the plane is being refueled

70
Q

How does the fuel get from the center tank to the engines during normal operations?

A 
Center tank
Transfer ejectors (backed up by opposite ejector)
Main tanks
Scavenge ejectors (backed up by gravity)
Collector tanks
Main ejectors (backed up by boost pumps)
Engines
71
Q

What drives motive flow through all of the ejector pumps?

A

Engine driven fuel pumps

72
Q

If the engine driven fuel pump fails, will the engine stay on?

A

No

73
Q

When would you turn the BLEED AIR WING A/I CROSSBLEED knob?

A

When directed by the QRH

74
Q

If you lost your L engine, what would the QRH have you do with the BLEED AIR WING A/I CROSSBLEED knob?

A

FROM RIGHT

75
Q

What would the valves do in this configuration? (crossbleed FROM RIGHT)

A

Wing anti ice crossbleed valve would open (top valve)
L valve would close
R valve would open

76
Q

What valves does the BLEED VALVE knob control?

A

Look on ECS SYN.
PRSOVs for the engines
APU valve
XFLOW valve

77
Q

In auto, what happens to those 4 valves?

A

It automatically controls the valves. For example, if APU is on it’s going to shut off the engine valves and provide bleed air from the APU.

78
Q

In the CLSD position, what are the valves going to do?

A

Engines and APU valves will be shut off

79
Q

If the engines and APU are turned off, is there any other way to get air to the system?

A

External air (powers the PACKS and pressurization)

80
Q

When would we select BLEED VALVES in manual?

A

When directed by the QRH. Configure the panel before selecting MANUAL

81
Q

If your BLEED VALVES are in manual, the ISOL valve is CLSD, and the BLEED SOURCE is the APU, what PACK could be powered?

A

PACK 1

82
Q

If AVAIL is illuminated on the APU START/STOP switchlight, do you have to do anything more to get power from the APU?

A

No. Means the APU is currently in use

83
Q

APU load control valve is a ____ valve

A

Bleed air

84
Q

Which gauge are you looking for the APU starter to cut out by 60%?

A

APU RPM gauge

85
Q

How do we do a bleeds closed takeoff?

A

Turn APU on (for AC & pressurization)

CRJ900 Mesa CL-65 Study Cards (9 decks)

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