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A
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MAINTENANCE MANUAL
PERFORMANCE
TRU TRK 340 LAT
-15.1
GROSS WT287.6
SAT +12.0 CAS 245 TAT +12.0
GS 245.6 MACH 0.615 ALT 21030
OIL
70 70 PRESS 70 70
1.800 1.800 EPR MAX 1.800 1.800 80 80 TEMP 80 80
1.753 1.753 EPR CMD 1.753 1.753 18 18 QTY18 18
1.753 1.753 EPR 1.753 1.753
85.6 85.6 N1 85.6 85.6
A B VIBB A
1.2 1.2 N1 1.2 1.2 350 765 EGT 350 350
1.3 1.3 N2 1.3 1.3
75.3 75.3 N2 75.3 75.3
1.1 1.1 BB 1.1 1.1
17.56 17.56 FF 17.56 17.56 N1PH
2828 2828
350 350 BURN PR 350 350 12 DUCT PRESS 12
DATE 02SEP90 GMT 18:54:04
LATITUDE
MACH NUMBER
TRUE TRACK
ANGLE
STATIC AIR TEMPERATURE
GROUND SPEED
ENGINE OIL
DATA
ENGINE
VIBRATION
DATA CALIBRATED AIRSPEED
GROSS WEIGHT
TOTAL AIR TEMPERATURE
ALTITUDE
ENGINE PRESSURE RATIO DATA
N1 ROTOR SPEED
EXHAUST GAS TEMPERATURE
N2 ROTOR SPEED
FUEL FLOW
BURNER PRESSURE
DUCT PRESSURE
EICAS Performance Maintenance Display
Figure 55
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MAINTENANCE MANUAL
(1) General
(a)
Performance parameters for environmental data, engine gas flow data, engine oil data and engine vibration data are presented for display.
(b)
The following EIU interface sources are used to obtain the data required to generate the EICAS performance maintenance display. 1) SAT, CAS, MACH and ALT are received by the EIU on an ARINC
429 data bus from the Air Data Computer (ADC). 2) TAT is received by the EIU from either the Flight
Management Computer (FMC) or the ADC. 3) Gross weight is received from the FMC. 4) EPR MAX is received by the EIU from either the FMC or the
Electronic Propulsion Control System (EPCS). 5) The EPCS also supplies EPR, EPR CMD, EGT, burner pressure and oil temperature data.
6) N1 and N2 rotor speeds are received by the EIU from the EPCS or alternately as direct inputs from analog sensors located within the engines.
7) Duct pressure is received from the Air Supply Control and Test Unit (ASCTU). 8) Ground speed, true track angle, and latitude are received from the Inertial Reference Units (IRUs). 9) Fuel flow, fuel pressure, oil pressure and oil quantity are received by the EIU as direct variable analog signals. 10) Vibration data is received from the Airborn Vibration Monitor Unit (AVM).
(2)
Gross Weight
(a) Displayed in units of kgm/1000.
(3)
Total Air Temperature (TAT)
(a) Displayed in units of °C (Celsius).
(4)
Altitude (ALT)
(a) Displayed in units of feet.
(5)
Mach Number (MACH)
(a) Displayed value is the ratio of true airspeed to the local speed of sound.
(6)
Static Air Temperature (SAT)
(a) Displayed in units of °C (Celsius).
(7)
Ground Speed (GS)
(a) Displayed in units of knots.
(8)
Calibrated Air Speed (CAS)
(a) Displayed in units of knots.
(9)
True Track Angle (TRU TRK)
(a) Displayed in units of degrees.
(10)
Latitude (LAT)
(a) Displayed in units of degrees.
(11)
Engine Oil Data (OIL)
(a) Oil pressure (PRESS), oil temperature (TEMP) and oil quantity (QTY) are displayed for engines 1 thru 4. Pressure is displayed in units of psi, temperature in °C (Celsius) and quantity in quarts.
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