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POWER PLANT
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
18−10−14
ENGINE INDICATIONS
Primary engine parameters are displayed on EICAS. Secondary engine parameters are displayed on
the STAT page.
GF1810_023
OIL QTY (QTS)
ENG
APU
RES
RPM
10.4
20
1300
90
22 0.00
100 650
03 03 03 03
4.5
5.0
10.4
CKPT ( C)
OXYGEN
CAB ALT
CAB RATE
P
AFT
CABIN (°C)
APU
%
CABIN (°C)
22
19 20 20
EGT
BRAKE TEMP
LDG ELEV
500
1000
FWD
TOTAL FUEL (LBS) 41550
1.54 1.54
73.3 73.3
789 789
14600 10000 14600
2350 ND
STAB
NU
NL RUDDER
LWD RWD
NR
TRIMS
7.2
N2
FF (PPH)
OIL TEMP
OIL PRESS
93.4
5750
115
81
93.4
5750
115
81
EPR
N1
ITT
AIL
Engine Pressure Ratio (EPR)
Used to display thrust and is the
primary thrust setting indicator.
1.65 1.65
EICAS
STAT page
N1 (FAN)
Used to display the LP compressor (fan)
speed and as Secondary thrust setting
indicator and is measured in %.
Inter Turbine Temperature (ITT)
Used to display engine operating
temperatures in °C.
N2 (HP compressor)
Used to display HP compressor
speed and is measured in %.
Fuel Flow (FF)
Used to display the amount of fuel
being used, in pounds per hour
(PPH) or kilograms per hour
(KPH).
Oil Temperature (OIL TEMP)
Used to display the oil
Oil Pressure (OIL PRESS)
Used to display the oil
Engine Oil Quantity (ENG)
Used to display the oil quantity in
the engine and is measured in
U.S. quarts.
Oil Reservoir Quantity (RES)
Used to display the amount of oil
in the replenishment tank and is
measured in U.S. quarts.
CRZ
SYNC
temperature in °C.
pressure in psi.
POWER PLANT
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
18−10−15
ENGINE INDICATIONS (CONT'D)
Engine Pressure Ratio (EPR)
EPR is the primary control mode for thrust setting.
Raw EPR is calculated as a ratio of engine inlet total pressure and engine exhaust total pressure
(P20 and P50) and then trims are applied to generate a fully trimmed EPR for engine control and
display.
The engine inlet total pressure and temperature are sampled at the fan inlet. Engine inlet total
pressure (P20/T20) is used by the EEC. P20 is used by the EEC for control functions and in the
calculation of EPR and Mach number. Temperature sensor (T20 )is used by the EEC for control
function and for various EPR related functions.
GF1810_024 INTAKE COWL
LEADING EDGE
P20/T20 PROBE
SPINNER
FAN BLADES
OUTLET GUIDE VANE CASING
P50 PRESSURE PROBE
The core engine exhaust total pressure (P50), in combination with P20/T20, is also used by the
EEC for EPR calculation. P50 air is sensed by four pressure probes, located on the outlet guide
vane assembly. The pressure transducer within the EEC provides a signal to both channels of the
EEC and is temperature compensated. The data entry plug ensures that both engines display the
same EPR for the same actual engine thrust level.
GF1810_025
P20 P50
AIRFRAME
ENGINE
EEC
CHANNEL
A
EEC
CHANNEL
B
DATA
ENTRY
PLUG
P20
1.54
EPR
1.65
CRZ
SYNC
1.54
1.65
POWER PLANT
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
18−10−16
ENGINE INDICATIONS (CONT'D)
EPR Control
EPR control mode is selected on the engine control panel, located on the pedestal. Both EPR or
N1 switches should be the same selection.
GF1810_026
Engine Switches
Used to select engine control mode:
N1 − selects engine control in alternate mode.
EPR − selects engine control in primary mode.
ENGINE
L
N1
EPR
R
N1
EPR
EPR Indication
GF1810_027
Note:
When the EPR readout and
the EPR rating match, the
bugs will blend.
EPR Rating Mode
Displays thrust rating which are selected
automatically or manually. The following
rating modes are available:
Takeoff
( ) mode
NOTE
All indications will be magenta except when MAN or FLEX is selected, in which case
SYNC Mode
　
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