Powerplant Flashcards
Engine
TFE 731-50R twin spool turbofan
how many igniter plugs and fuel nozzles
2, 12
how much oil
1.65 gallons
what is the ignition powered by
PE bus
what do the DEECS run on
28vDC from PE bus
(Two of them)
engine shut down if N1 exceeds ____ or N2 exceeds _____
107% , 107.7%
Engine Sync
compares N1 or N2 of master engine (left) to right
authority range is +/- 2.5% N2 at midrange positions
inop with APR armed
what uncommanded slit will trigger APR
15% of N2
what type of thrust reversers
TR5050 bucket type
how are thrust reversers controlled
electrically through the PE bus
thrust reverser ion ground annunciator
rudder bias not inhibited
thrust reverser in flight indication
unlocked
N2 can spin at ____ RPM
30,000
TFE 731 spool up time
7 seconds
difference between stator and compressor
stators are stationary,
compressors spin
what’s on the accessory drive
Oil pump
Fuel pump (high pressure)
Starter generator
Alternator
Fuel control unit
Hydraulic pump
Where does the dEEC get info from
Engine inlet pressure
Engine inlet temperature
Interstage turbine temp
N2 and N1 speeds
Power lever angle
what do the DEEC inputs allow it to do
schedule, govern, and limit engine
what do the hp cocks do
when closed, mechanically lock thrust levers in full idle position
red fire warning light to indicate fire when in ON position
max thrust operating limit
5 minutes
APR Automatic Power Reserve automode may activate when
Automode - APR activates when an uncommanded split in N2 occurs of 15% or more
what do we operate the ignition in
AUTO
uncommanded ____ RPM drop will cause _____ to activate
500 rpm drop in N2 will reactivate ignition
What measures the interstage turbine temperature
10 thermocouples between the high pressure turbine and first stage of the low pressure turbine
What oil pressure will cause the OIL 1 LO PRESS to illuminate
49 psi
where does the ignition system get power from
PE bus bar
The DEEC uses N1 or N2 for the control parameter
N1
can reverse thrust be used to taxi backwards
no
can reverse thrust be used in the air
no
can the engine be started with reverse thrusters deployed
no
when is thrust in excess of reverse idle above 50 KIAS allowed
prohibited unless emergency
is reverse thrust on unpaved surfaces allowed
no
the power plant classification on the Hawker 900xp
two-spool turbofan
When the aircraft is static on a standard day at sea level, each engine develops
4660 lbs of thrust
primary overspeed rpm-limiting device on the 731 series engine
mechanical governor in the FCU
Max HP rotor N2 overspeed is
102.5% for 10 seconds
max oil pressure for power at or above idle rpm
80 psi
max inter turbine temperature for engine starting
994C
max transient oil pressure permissible
100 psi
if the MWS reverser annunciator illuminates during the deploy cycle:
rudder bias not inhibited
to facilitate an accurate setting of climb power
CLIMB displayed in green on MFD engine display
the APR System is available
to any engine with an operative computer
DEEC ENG CMPTR switches to what during normal operation
AUTO
HP Cocks when closed
mechanically lock thrust levers in full idle position
APR does what
MAY allow automatic increase in engine thrust in event of engine failure
auto mode for APR activates
when an uncommanded split in N2 occurs of 15% or more
clogged oil filter
filter bypass displayed on a maintenance panel in the rear equipment bay
Start calls
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)
clogged fuel filter
ENG FUEL 1 or 2 annunciator
indicates fuel filter is being blocked and bypassed
