Engine System

Question 1

What are the 5 sections of the engine?

Answer 1

Inlet Section
Compressor section
Diffused Section
Combustion Section
Exhaust Section

Question 2

What is the thermodynamic shaft horsepower rating of the engine?

Answer 2

1,800 SHP

Question 3

What is the shaft horsepower rating of the engine when governed by the FCU?

Answer 3

1,500 SHP

Question 4

What is the shaft horsepower when torque limited by the transmission to a Take Off Power (TOP)?

Answer 4

1,290 SHP = 100% torque (for 5 minutes)

Question 5

What is the maximum continuous power (MCP) of the engine?

Answer 5

1,134 SHP = 88% Torque

Question 6

Is there torque limiting on the engine?

Answer 6

No

Question 7

What ratio does the compressor section increase air pressure?

Answer 7

7:1 Ratio

Question 8

The compressor section has ____ stage axial and a ____ stage centrifugal

Answer 8

5 stage axial

1 stage centrifugal

Question 9

What does the bleed air reservoir (Piggy Back Chamber) power?

Answer 9

1. Cabin heating/defrost
2. Oil cooler fan
3. Engine de-ice
4. Improved particle separator

Question 10

What section are the inner liner, nozzles, Ng turbines (dive compressor motor) and Nf turbines (drive output shaft) a part of?

Answer 10

Combustion Section

Question 11

The EGT GREEN BAND is ____ to ____ degrees C PRIOR TO STABILIZATION (startup)

Answer 11

0 - 950 degrees C

Question 12

The EGT RED BAND is ___ degrees C upward PRIOR TO STABILIZATION (startup)

Answer 12

950 degrees C +

Question 13

The RED TRIANGLE is ____ degrees C (MAX ENGINE START)

Answer 13

950 degrees C

Question 14

What % Ng is the engine stabilized?

Answer 14

68% for 5 seconds

Question 15

The EGT GREEN BAND is ____ to ____ degrees ENGINE STABILIZED

Answer 15

400 - 820 degrees C

Question 16

The EGT WHITE BAND is ____ to ____ degrees ENGINE STABILIZED

Answer 16

0 - 400 degrees C

Question 17

The EGT YELLOW BAND is ____ to ____ degrees ENGINE STABILIZED

Answer 17

820 - 880 degrees C (30 minute limit)

Question 18

The EGT RED BAND is ____ to ____ degrees ENGINE STABILIZED

Answer 18

880 degrees C +

Question 19

____ turbines drive the compressor rotor

Ng or Nf?

Answer 19

Ng turbines

Question 20

____ turbines drive the power output shaft

Ng or Nf?

Answer 20

Nf

Question 21

The ____ assembly is contained within the air inlet section and measures torque applied to the engine output shaft in oil pressure

Answer 21

Torquemeter assembly

Question 22

The ____ sends the engine output shaft torque pressure (in %) to the MFD (displayed as a 3 color bar scale)

Answer 22

Torque transmitter

Question 23

The engine torque GREEN BAND for continuous operation is ____ to ____ %

Answer 23

0 - 88%

Question 24

The engine torque YELLOW BAND is ____ to ____% and has a 5 minute limit.

Answer 24

88 - 100%

Question 25

The engine torque RED BAND is ____%+

Answer 25

100% +

Question 26

Gear reduction provides a ____ RPM reduction ratio between the Nf turbines and the engine output shaft

Answer 26

3.22 : 1 gear reduction ratio

Question 27

The VIGV (Variable inlet guide vane actuator) is controlled by linkage from the ____ and is operated by ____ pressure.

Answer 27

Fuel Control controls it and fuel pressure operates it

Question 28

Make a note in the forms anytime you fly through what three things?

Answer 28

Volcanic ash, loose grass, or a salt-latent environment

Question 29

Icing of the air inlet screens can be expected at what temperature?

Answer 29

4 degrees C (40F) or below

Question 30

Fuel flow will increase about ____ lbs an hour (2%) with the bleed air heat on and ____lbs (3%) an hour with the de-ice on.

Answer 30

fuel flow increases 14 lbs per hour with bleed air heat on

fuel flow increases 21 lbs an hour with de-ice on

Question 31

De-ice fail safes to the __ position

Answer 31

ON

Question 32

The oil tank reservoir contains ____ US gallons of oil

Answer 32

3.25 gallons of oil

Question 33

Engine oil filter is bolted to the Ng accessory gearbox and has a popout button when differential ___ - ____ PSI

Answer 33

9 - 13 PSI

Question 34

The bypass valve on the engine oil filter is set to open at ____ - ____ PSI

Answer 34

15 - 20 PSI

Question 35

Thermal lockout device prevents extension of pop-out button during starts when engine is cold at temperatures below ____ +/- ____

Answer 35

32 deg F +/- 20 deg F

Question 36

The ODDS chip detector burns off metal particles smaller than ____ inches

Answer 36

.005 inches

Question 37

The engine oil cooler is driven by ____

Answer 37

Bleed air

Question 38

The Ng turbine is also known as the ____ turbine

Answer 38

Gas producer turbine

Question 39

The Ng accessory gearbox contains what accessories?

Hint - S.O.F.T

Answer 39

Starter / Generator - starts engine / standby DC power

Oil Pump - pressurizes oil system

Fuel Control Unit - Meters fuel to combustion section

Ng Tachometer

Question 40

What accessories are found on the Nf accessory gearbox?

Hint - T.O.T

Answer 40

Torquemeter boost pump - operates torquemeter assy

Overspeed Governor - bypasses the main metering valve opening to maintain constant selected Nf RPM (driven at speeds proportional to Nf speed)

Nf tachometer - sends signals to the EDCU to display the Nf RPM in %

Question 41

What three components make up the Fuel Control Assembly?

Answer 41

Overspeed governor (Nf Speed)

Computer Section (Ng Speed)

Metering Section (Ng Speed)