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Sept 04
17-11
P I LOT T R A I N I N G GU I D E
POWER PLANT
N2 INDICATION
FUEL FLOW
The fuel flow transmitters will send a signal of engine consumed fuel flow to the EEC.
Fuel flow is either displayed in pounds/hour (pph) or kilograms/hour (kph), depending
on customer specifications.
N2
FF (PPH)
OIL TEMP
OIL PRESS
77.O
575O
115
81
N2
FF (PPH)
OIL TEMP
OIL PRESS
75.8
575O
115
81
N2
FF (PPH)
OIL TEMP
OIL PRESS
99.8
575O
115
81
N2
FF (PPH)
OIL TEMP
OIL PRESS
99.O
575O
115
81
N2
FF (PPH)
OIL TEMP
OIL PRESS
93.4
575O
115
81
93.4
575O
115
81
N2 Readout
Displays the current
N2 readout.
N2 Amberline
If the N2 speed limit is exceeded the
N2 readout will turn amber. The
amberline is set at > 98.9% N2, or
greater.
N2 Redline
If the N2 speed exceeds the
amberline limits, the N2 readout will
turn red and will flash. The redline is
set at > 99.6% N2, or greater.
N2 Readout with
Wing Anti-Ice Active
If N2 RPM is < 76% N2 with WAI
active (AUTO or ON) the N2
readout will turn white.
If N2 RPM is 76% N2 then the
N2 readout will turn green.
>
GX_17_028
17-12 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
POWER PLANT
FUEL FLOW INDICATION
OIL TEMPERATURE
Oil cooling is achieved by the Fuel Cooled Oil Cooler (FCOC). The oil temperature
bulbs provide temperature to the EEC.
OIL TEMPERATURE INDICATION
OIL PRESSURE
The oil pressure transducer provides an indication of the pressure between the oil feed
and scavenge lines.
57OO FF (PPH) 5756
GX_17_029
FF (PPH or KPH) Readout
Displays the current fuel flow readout.
175 OIL TEMP
115 OIL TEMP 115
-4O OIL TEMP
1O OIL TEMP
GX_17_030
OIL TEMP Readout
Displays the current oil temperature readout.
HIGH Temperature Redline
If the oil temperature exceeds 160°C the OIL
TEMP readout will turn red and will flash.
LOW Temperature Redline
If the oil temperature is lower than -30°C the OIL
TEMP readout will turn red and will flash.
LOW Temperature Amberline
If the oil temperature is 20°C or less but higher
than -30°C the OIL TEMP will turn amber.
For Training Purposes Only
Sept 04
17-13
P I LOT T R A I N I N G GU I D E
POWER PLANT
OIL PRESSURE INDICATION
ENGINE OIL SYSTEM
The function of the oil system is to lubricate and cool the engine bearings and gears.
The system is a full flow recirculating type.
The oil for the engine is stored in a tank, which is an integral part of the accessory
gearbox. An oil pump will take the oil from the tank to supply the front bearing
chamber, the rear bearing chamber and the accessory gearbox, via an oil pressure filter
and a fuel cooled oil cooler (FCOC). An oil replenishment tank is located in the aft
equipment bay.
MINIMUM OIL PRESSURE - N2 DEPENDENT
N2 GROUND FLIGHT
10 seconds time delay
50% 35 psi 25 psi
72.3% 35 psi 25 psi
90% 45 psi 35 psi
81 OIL PRESS 81
25 OIL PRESS
33 OIL PRESS
GX_17_031
OIL PRESS Readout
Displays the current oil pressure readout.
Low Pressure Redline
if the oil pressure is 25 psi or lower, OIL PRESS
readout will turn red and will flash.
Low Pressure Amberline
The minimum low press amberline is N2 dependent
as follows:
17-14 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
POWER PLANT
The oil quantity transmitter provides indication to the STATUS page and will display
an OIL LO QTY message if the oil quantity is low.
The pump supplies pressure to move the oil to the bearings and drive gear and to
return it to the tank. The oil pressure transducer provides an indication of the pressure
between the oil feed and scavenge lines and displays it on EICAS.
If the oil pressure is low, while the engine is running, an OIL LO PRESS message is
displayed on EICAS.
Oil is fed to the pressure filter. The filter removes debris prior to delivery to the
bearing/gears. A pressure relief bypass valve allows oil to bypass the filter in the event
of filter blockage, and an OIL FILTER message will be displayed on EICAS,
indicating an impending bypass.
The oil temperature bulbs provide oil temperature to the Electronic Engine Controller
(EEC). This data is used by the Heat management System and is also sent to EICAS.
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