Engines and Propellor

Question 1

SHP RATING

Answer 1

4,580SHP

Question 2

Type

Answer 2

PW150A

Question 3

FADEC?

Answer 3

Full Authority Digital Engine Control

Question 4

What drives accesory gearbox

Answer 4

High pressure compressor

Question 5

What supplies power to FADEC in each engine and also the APU

Answer 5

Right Essential Power Bus powers APU FADEC

Respective PMA’S power each engines FADEC

FADECS are secondarily powered by the essential buses

Question 6

When does FADEC become operational

Answer 6

20% gas generator speed

Question 7

How many FADEC channels

Answer 7

2

Question 8

MAX RPM

Answer 8

1020RPM

Question 9

MAX Power available

Answer 9

125% T/O RATING POWER

Question 10

MTOP

Answer 10

Maximum Take off Power

Question 11

NTOP

Answer 11

Normal Take off Power

Question 12

UPTRIM

Answer 12

Power loss engine’s PEC sends signal to FADEC of operating engine to increase to MTOP and increase power by 10%

Question 13

Moving Power Levers into Overtravel region does what to prop RPM?

Answer 13

Automatically increases to 1020RPM regardless of Condition lever position

Question 14

TORQUE LIMITS

Answer 14

Reverse - 35%
Forward - 106%
Overtravel - 125%
Feathered - 135%

Question 15

What is the propellor Underspeed governing speed?

Answer 15

Prop speed - 660RPM

Question 16

How does the Nh overspeed correct and when?

Answer 16

FADEC restrics fuel flow if 108% is exceeded

Question 17

What are the three fault classifications

Answer 17

Critical
Cautionary
Advisory

Question 18

Critical Failure definition

Answer 18

Detects faults which result in stabilizing the engine at FLT IDLE or GND IDLE, depending on airspeed or air/gound status
A commanded engine shutdown
FADEC signals illumination of the #1 or #2 ENG FADEC FAIL warning Light

Question 19

Cautionary Fault definition

Answer 19

• Detected faults involving asymmetric Power Lever position or rapid Power Lever movement resulting in engine surge
• FADEC signals illumination of #1 or #2 ENG FADEC Caution Light

Question 20

Advisory Fault Definition

Answer 20

Advisory faults are detected not classified as critical or cautionary. FADEC transmits Advisory fault codes to the engine monitoring unit and engine display

Question 21

How many ignitors per engine

Answer 21

2

Question 22

How much oil in oil tank

Answer 22

6 QTS check within 15-30mins of shutdown

Question 23

What PSI triggers low oil pressure annunciation

Answer 23

<47psi

Question 24

When do you introduce fuel in an engine start

Answer 24

Once the NH begins to rise

Question 25

When is starter cycle complete

Answer 25

50%NH

Question 26

When does FADEC abort start

Answer 26

Light off doesnt occur within 16 sec of fuel flow introduction ITT limit of 920 deg C is exceeded NH does not reach 50% in 70 sec

Question 27

What happens after FADEC aborts start

Answer 27

Select switch auto centers | START caption in the START Switchlight extinguishes

Question 28

What is difference for starting in in-flight starts

Answer 28

Both ignitors are used Auto Abort features are disabled FADEC doesnt monitor ITT

Question 29

Indicated TRQ range

Answer 29

0-199%

Question 30

Indicated PROP RPM Range

Answer 30

0 - 1990RPM

Question 31

ITT value Range

Answer 31

-99 - 1,999 deg C

Question 32

MCP

Answer 32

MAX CONTINUOUS POWER

Question 33

MCL

Answer 33

MAX CLIMB POWER

Question 34

MCR

Answer 34

MAX CRUISE POWER

Question 35

What prop RPM is MCR available at

Answer 35

850 or 900 RPM

Question 36

NH range

Answer 36

0 - 199.9%

Question 37

NL range

Answer 37

0 - 199% | Low pressure turbine speed

Question 38

Oil temp range

Answer 38

-99 - 199 deg C

Question 39

Oil Pressure range

Answer 39

0 - 299 PSI

Question 40

Normal oil pressure range

Answer 40

40 - 80 PSI

Question 41

MCR

Answer 41

Changes engine rating when condition levers are set to MIN/850 from MCR to MCL

Question 42

MCR

Answer 42

Changes engine rating when condition levers are set to 900 from MCL to MCR

Question 43

alternative way to feather prop?

Answer 43

ALTERNATIVE FEATHER pump 28VDC

Question 44

Prop Gnd range is below what blade angle?

Answer 44

16deg

Question 45

When is autofeather armed?

Answer 45

``` TRQ > 50 % A/F ON PLA > 60% Condition levers set to max/1020RPM engines running Displayed on ED ```

Question 46

The Automatic Takeoff Power Control System (ATPCS) AKA “Uptrim” is triggered by what four conditions? Is it dependent on Autofeather selection??

Answer 46

Torque of the failed engine falls below 25% “OR” Np falls below 816RPM & PLA is set to high & MTOP is not set It is independent of the autofeather system.

Question 47

How to disarm autofeather

Answer 47

Other engine fails Pushing switch off Retarding PWR LVR to FLT IDLE remote prop autofeathering

Question 48

when does AUPC (automatic underspeed propeller control) activate

Answer 48

propeller speed <816RPM

Question 49

How is the propeller overspeed governing accomplished?

Answer 49

Hydraulically at 1060RPM by stopping the HP oil supply to the hub and allowing the counterweights to coarsen the pitch. Electrically at 110% or 1120RPM by the FADEC signaling to reduce fuel through the Fuel Metering Unit

Question 50

How is the Nh protected from over speeds? When is it used in normal operations?

Answer 50

The FADEC issues a dual channel signal to the fuel shutoff solenoid when the Nh signal reaches 108%. It is used to shut down engines in normal operations.