Powerplant

Question 1

Engine

Answer 1

TFE 731-50R twin spool turbofan

Question 2

how many igniter plugs and fuel nozzles

Answer 2

2, 12

Question 3

how much oil

Answer 3

1.65 gallons

Question 4

what is the ignition powered by

Answer 4

PE bus

Question 5

what do the DEECS run on

Answer 5

28vDC from PE bus
(Two of them)

Question 6

engine shut down if N1 exceeds ____ or N2 exceeds _____

Answer 6

107% , 107.7%

Question 7

Engine Sync

Answer 7

compares N1 or N2 of master engine (left) to right

authority range is +/- 2.5% N2 at midrange positions

inop with APR armed

Question 8

what uncommanded slit will trigger APR

Answer 8

15% of N2

Question 9

what type of thrust reversers

Answer 9

TR5050 bucket type

Question 10

how are thrust reversers controlled

Answer 10

electrically through the PE bus

Question 11

thrust reverser ion ground annunciator

Answer 11

rudder bias not inhibited

Question 12

thrust reverser in flight indication

Answer 12

unlocked

Question 13

N2 can spin at ____ RPM

Answer 13

30,000

Question 14

TFE 731 spool up time

Answer 14

7 seconds

Question 15

difference between stator and compressor

Answer 15

stators are stationary,
compressors spin

Question 16

what’s on the accessory drive

Answer 16

Oil pump
Fuel pump (high pressure)
Starter generator
Alternator
Fuel control unit
Hydraulic pump

Question 17

Where does the dEEC get info from

Answer 17

Engine inlet pressure
Engine inlet temperature
Interstage turbine temp
N2 and N1 speeds
Power lever angle

Question 18

what do the DEEC inputs allow it to do

Answer 18

schedule, govern, and limit engine

Question 19

what do the hp cocks do

Answer 19

when closed, mechanically lock thrust levers in full idle position

red fire warning light to indicate fire when in ON position

Question 20

max thrust operating limit

Answer 20

5 minutes

Question 21

APR Automatic Power Reserve automode may activate when

Answer 21

Automode - APR activates when an uncommanded split in N2 occurs of 15% or more

Question 22

what do we operate the ignition in

Answer 22

AUTO

Question 23

uncommanded ____ RPM drop will cause _____ to activate

Answer 23

500 rpm drop in N2 will reactivate ignition

Question 24

What measures the interstage turbine temperature

Answer 24

10 thermocouples between the high pressure turbine and first stage of the low pressure turbine

Question 25

What oil pressure will cause the OIL 1 LO PRESS to illuminate

Answer 25

49 psi

Question 26

where does the ignition system get power from

Answer 26

PE bus bar

Question 27

The DEEC uses N1 or N2 for the control parameter

Answer 27

N1

Question 28

can reverse thrust be used to taxi backwards

Answer 28

no

Question 29

can reverse thrust be used in the air

Answer 29

no

Question 30

can the engine be started with reverse thrusters deployed

Answer 30

no

Question 31

when is thrust in excess of reverse idle above 50 KIAS allowed

Answer 31

prohibited unless emergency

Question 32

is reverse thrust on unpaved surfaces allowed

Answer 32

no

Question 33

the power plant classification on the Hawker 900xp

Answer 33

two-spool turbofan

Question 34

When the aircraft is static on a standard day at sea level, each engine develops

Answer 34

4660 lbs of thrust

Question 35

primary overspeed rpm-limiting device on the 731 series engine

Answer 35

mechanical governor in the FCU

Question 36

Max HP rotor N2 overspeed is

Answer 36

102.5% for 10 seconds

Question 37

max oil pressure for power at or above idle rpm

Answer 37

80 psi

Question 38

max inter turbine temperature for engine starting

Answer 38

994C

Question 39

max transient oil pressure permissible

Answer 39

100 psi

Question 40

if the MWS reverser annunciator illuminates during the deploy cycle:

Answer 40

rudder bias not inhibited

Question 41

to facilitate an accurate setting of climb power

Answer 41

CLIMB displayed in green on MFD engine display

Question 42

the APR System is available

Answer 42

to any engine with an operative computer

Question 43

DEEC ENG CMPTR switches to what during normal operation

Answer 43

AUTO

Question 44

HP Cocks when closed

Answer 44

mechanically lock thrust levers in full idle position

Question 45

APR does what

Answer 45

*MAY* allow automatic increase in engine thrust in event of engine failure

Question 46

auto mode for APR activates

Answer 46

when an uncommanded split in N2 occurs of 15% or more

Question 47

clogged oil filter

Answer 47

filter bypass displayed on a maintenance panel in the rear equipment bay

Question 48

Start calls

Answer 48

Start (operating button) N2 (connected to starter/generator via tower shaft) (At 12% rotation without making a call HP cock up) ignition fuel flow ITT N1 Oil (at 49 PSI)

Question 49

clogged fuel filter

Answer 49

ENG FUEL 1 or 2 annunciator indicates fuel filter is being blocked and bypassed