Powerplant Flashcards

1
Q

What is the engine on the CL604?

A

CF34-3B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the bypass ratio on the
CF34-3B

A

6.2:1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the normal takeoff thrust rating per engine?

A

8729lbs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the thrust for engine out operations? (APR)

A

9220lbs

+2%, 500 lbs of thrust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What temperature will decrease thrust at takeoff?

A

ISA +15

“Flat rated”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How many titanium blades does the fan consist of?

A

28

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How many compression/ turbine stages does N1 and N2 have?

A

N1: 1 compressor, 4 turbine
N2: 14 compressor, 2 turbine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What controls the variable geometry compressors?

A

Fuel from the FCU

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What percentage of power does the bypass air provide at take off?

A

80%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Fuel can be cutoff from the engine in what 2 ways?

A

Moving the thrust lever to shutoff or pressing the FIRE PUSH switch light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the engine driven fuel pump driven by?

A

The accessory gear box

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does the ECU (control amplifier) do?

A

Controls N1 when above 79% (provided ENG SPEED switches on)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the maximum allowable difference in N2 between the two engines at idle?

A

2%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which valves open when the left engine START switch is pressed in?

A
  • L & R ENG SOV
  • 10th Stage ISO
  • L Start valve
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How much does the APR system command following an engine failure?

A

2%

500 lbs thrust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

TR speed limitation?

A

60% N1 at 60 knots or less

60 @ 60

17
Q

What do the engine speed switches do?

A

Turn ON/OFF N1 ECU

(changes from N1 to N2 mode at 79% N1)

18
Q

10th Stage Bleed Air is normally used for…

A
  • Engine Starting
  • Air conditioning and pressurization
19
Q

Engine cross bleed minimum for start is…

A

60 psi (~85% N2)

20
Q

Engine air starts should not be attempted above ____ ft.

21
Q

APR arming?

A

5 minutes after 79% N1

With APR switch in the ARM position

22
Q

If a PACK fails above ____ select cowl anti-ice to on.

23
Q

FCU

A

Fuel Control Unit
Hydromechanical up to 79% N1
Speed control above 79% N1

CAUTION: turning ON/OFF at high power settings

24
Q

APR activation?

A

N1 on one engine goes below 67.6%

25
Q

Oiler?

A
  • 15 min - 2 hour post shutdown
  • 6.4 oz/0.2 qt/0.05 gal per hour
  • Adding 2 quarts requires dry run
26
Q

Ignitor facts

A
  • Dual
  • A channel AC ESS BUS
  • B channel BATT BUS
  • 55% cutoff (normal)
  • Auto-ignition – A & B during stall (SPS)
27
Q

VIB monitor

A

N1: 2.7 mils
N2: 1.7 mils

28
Q

Thrust Reverser facts

A
  • 5 sec to deploy
  • 14th Stage drives Power Drive Unit (PDU)
  • 24 knots max X-Wind
  • Anti-ice disabled with deployment
29
Q

ITT Limits

A
  • MAX Continous 900 deg C
  • MAX 2 min 928 deg C
  • START 903 deg C 50 seconds
30
Q

What is “cold soak” and what do you do?

A
  • <22 degrees C for over 8 hours
  • Dry motor 60 seconds
  • Cycle TRs until 5 seconds or less
31
Q

OIL Tempurature limits

A
  • -40 C Start
  • 45 psi minimum T/O
  • 130 psi at idle 10 minutes
32
Q

ITT limit for start

Thrust lever over “hump”…

A
  • <120 C Ground start
  • <90 C Air start
33
Q

Engine Starter Cranking Limits

A

3 starts then 5 min cooling

34
Q

Oil Pressure Limits

A
  • 25 psi min
  • 45 psi t/o minimum
  • 115 psi Max continous
  • 156 psi Cold start