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CRJ900 Mesa CL-65 Study - August 2019 Study Guide M > Oral Study Guide > Flashcards

Oral Study Guide Flashcards

1
Q

Where does the DC service switch get power from

A

APU battery direct bus

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2
Q

Why do we not leave the airplane in the service configuration using the DC service switch

A

Drains the APU battery

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3
Q

With the battery master switch on (No AC power established) which screens come online and what is the limitation

A
  1. ED1, ED2, ISI

2 5 Minutes (AC fans are not running to cool the screens)

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4
Q

What does the AVAIL illumination on the AC switch light indicate

A

Correct voltage, frequency, and phase. (115V ac, 400Hz, and 3 Phase)

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5
Q

What does the FAULT illumination of the IDG switch light inidcate

A

Hi oil temperature and low oil pressure in the IDG

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6
Q

What does the DISC illumination on the IDG switch light indicate

A

Associated IDG disconnected

To reset, engine has to be off and it can only be reset by maintenance on the ground

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7
Q

How can an IDG be disconnected

A

Manually or Automatically.

Over temperature or over Torque

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8
Q

Explain the auto disconnect of an IDG

A

The shaft in the IDG will shear due to over torque or temperature.

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9
Q

What does the illumination of the AC ESS XFER switch light indicate

A

AC not being provided by AC Bus 1

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10
Q

What does the illumination of the FAIL on the AUTO XFER switch light indicate

A

BUS fault or generator over current.

Takes generator offline

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11
Q

How many generators are installed on the airplane

A

4

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12
Q

What does the illumination of the OFF on the AUTO XFER switch light indicate

A

Disabled the automatic transfer system on the affected side generator

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13
Q

What are the main generators rated at

A

40KVA

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14
Q

What is the ADG rated at

A

15KVA

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15
Q

What would cause the ADG to auto deploy in flight

A

Loss of power on AC BUS 1 and 2

Complete AC power loss

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16
Q

If the ADG is deployed in flight, what does it power

A 
FlASH - Acronym
Flaps
AC ESS BUS
Stab trim CH2
Hydraulic Pump 3B
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17
Q

What is the purpose of the L and R HYD SOV guarded switch lights

A

Isolate the flow of Skydrol (Hydraulic fluid) to the engine driven pumps

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18
Q

With the hydraulic switches on AUTO/ON, when will the B pumps operate

A
  1. In Auto, the B pumps will operate when flaps are out of the ZERO position (Flaps 8+) with at least one operational generator and power to the AC buses
  2. In ON Mode they will be operating continuously
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19
Q

Taxiing on the left engine (right engine off) flaps up APU running (first flight of the day) switches AUTO/ON which hydraulic pumps are running and how much breaking is available

A

3A,1A and the inboard brakes only

20
Q

During normal takeoffs and landings which hydraulic pumps are operating (AUTO/ON)

A

1A,1B,2A,2B,3A,3B (All of them)

21
Q

If there are is a failure of an A pump in flight, will a B pump automatically come online AUTO/ON

A

If the switches are in the ON position Yes they will be on.

If the switches are in the AUTO position No they will not come on in normal cruise flight. Since they flaps are not extended in cruise flight

22
Q

How many ways can we transfer fuel

A

Three different ways. Automatically, Manually, and Gravity.

23
Q

What does the INOP on the boost pump switch light indicate and what does the ON light indicate

A

INOP - The pump pressure is low or pump has failed

ON - Pump is operating

24
Q

When do the boost pumps operate

A

Once they are armed by selecting the boost pump switch light, they will turn ON when starting the engine and when the FSC detects low pressure from the main ejector corresponding to that side. The boost pumps will always operate together

25
Q

When will the fuel system auto transfer fuel

A

200lb imbalance between the main (wing) tanks. It will fill the lower tank to level plus 50lbs

26
Q

What does the illumination of the FAIL on the gravity switch light indicate

A

Indicates the valve is not in the commanded position

27
Q

What does the illumination of the FAIL XFLOW switch light indicate

A

The switch light indicates the valve is not in the commanded position

28
Q

What happens if you move the WING A/I CROSS BLEED switch from the normal position to FROM LEFT or FROM RIGHT

A
  1. Appropriate (opposite of selected) anti-ice isolation valve closes
  2. Cross bleed valve opens
29
Q

If you select the BLEED VALVES knob from AUTO to CLSD which valves will close

A

Closes PRSOV’s for Left and Right engine and APU Load Control Valve (LCV)

30
Q

If you want to use the APU as your primary bleed source, how would you do that

A
  1. Select APU with the BLEED SOURCE selector knob
  2. Move the isolation toggle switch to open
  3. Turn the BLEED VALVES selector to MANUAL
31
Q

First flight of the day, before you start the APU, what must be performed

A

Fire detection/Firex Monitor test must be completed

32
Q

What is the minimum battery voltage to start the APU where is the voltage verified

A
  1. 22 volts on both APU and Main battery.
  2. Batteries are verified on the DC ELECTRICAL Synoptic page
    (APU Battery powers starter motor for APU, Main battery powers APU ECU for start)
33
Q

What are the APU start limitations

A

3 attempts per hour, 2 minute between each attempt

34
Q

What does the illumination of the PUMP FAIL on the PWR FUEL switch light indicate

A

APU fuel pump failed

35
Q

What does the illumination of the SOV FAIL on the PWR FUEL switch light inidicate

A

APU fuel feed shutoff valve is not in the commanded position

36
Q

What are the APU priorities

A

1st Priority is to supply electrical power

2nd Priority is pneumatics

37
Q

What is the maximum altitude we can use the APU for electrical loading

A

FL410

38
Q

What is the maximum altitude for starting the APU

A

FL370

39
Q

What is the maximum altitude for bleed air extraction from the APU

A

FL250

40
Q

What tank supplies the APU with fuel

A

Left collector tank

41
Q

If the APU fuel pump fails, will the APU shut down

A

No an internal bypass valve opens allowing fuel flow to remain uninterrupted via a high pressure pump

42
Q

For an unattended APU fire on the ground, what will happen?

A

On the ground the APU will shut down automatically and five seconds later the FIREX bottle will automatically discharge.

43
Q

If there is an APU fire in flight, what will happen?

A

In flight the APU will automatically shut down. FIREX discharge is done by the crew

44
Q

What are the steps for a normal engine start (APU Assist)

A

Refer to CFM 4.47
Normal Sequence Right engine then left
1. Trust levers, check at SHUT OFF position
2. ITT less than 120c
L or R boost pump on (L or R BOOST PUMP ON lights and advisory messages come on)
3. Fuel temperature is within normal limits (L or R FUEL TEMP LO caution messages is not displayed)
4. L or R engine START
5. When N2 reaches 20% RPM and ITT is below 120c Left or Right Thrust Lever IDLE (Fuel flow increasing, L or R AUTO IGNITION advisory messages comes on)
6. Starter Cutout Occurs at 50% N2
7. START switch light extinguishes
8. ENGINE START status message extinguishes

45
Q

During normal engine starts, what kind of protection does the FADEC provide

A

FADEC will abort for HOT and HUNG START’s. If this happens a L or R START ABORT caution message wil be displayed

46
Q

Define cold soaked aircraft and what we have to do if an aircraft is cold soaked

A

Cold soaked is an aircraft that has sat for more than 8hrs below -30c.
Engines must be motored 60 seconds
Thrust reverser actuated until deploy and stow less than 2 seconds

CRJ900 Mesa CL-65 Study - August 2019 Study Guide M (34 decks)

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