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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(d) Engine Oil Quantity
1) The engine oil quantity signal is from the engine-mounted oil quantity transmitter. The signal is processed and displayed in terms of % FULL by means of a numeric LED digital counter.
2) The OIL QTY indicator not only displays the engine oil quantity value, but also displays the fault code if a BITE test fails when initiated from a recessed BITE button.
(e) Engine Vibration
1) The engine vibration signal is from the airborne vibration monitoring system and is a dc current proportional to the vibration level. The VIB indicator displays the engine vibration level on a circular dial with an LED pointer.
2) The unit on the VIB indicator is dimensionless.
(f)
Hydraulic Oil Pressure
1) The hydraulic oil pressure signal is from hydraulic system A and B pressure transmitter. The HYD PRESS indicator displays the hydraulic pressure parameter value by a LED pointer moving on a circular dial.
(g)
Hydraulic Oil Quantity
1) The hydraulic oil quantity signal is from the hydraulic system reservoir-mounted transmitter and is processed by the opposite microprocessor. For example; the signal from system A hydraulic quantity transmitter comes in on the system B (right) channel, processed by the system B microprocessor, and displayed on the system A (left) side.
2) The HYD QTY indicator displays the hydraulic oil quantity value in terms of % FULL by means of a LED digital counter.
C. Secondary Display Parameter Range
Total air temperature: -60 to 99°C Engine oil pressure: 0 to 100 psi Engine oil temperature: -50 to 200°C Engine oil quantity: 0 to 100% of Full Capacity Engine vibration: 0 to 5 Scalar Units (Nondimensional) Hydraulic oil pressure: 0 to 4000 psi Hydraulic oil quantity: 0 to 100% of Full Capacity
4. Operation
_________
A. Primary Display (Fig. 4)
(1) The EIS Primary Display comprises two channels (left and right channels) both having independent but identical computing and signal conditioning elements. There is a total of eight separate microprocessors utilized by the panel, one for each of the four main parameters (i.e. N1, EGT, N2 and FF/FU) per channel. A further microprocessor controls the maintenance module, which is common to both channels.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
%N1 OUTPUT
APPROACH IDLE%N1 VALIDEGT OUTPUT
STARTER CUT-OUT%N2 OUTPUT
FF OUTPUT
ACTUAL %N1 INPUTLIMIT %N1
LIMIT %N1 VALID
MANUAL SELECT
EGT INPUT
%N2 INPUT
FUEL FLOW INPUT
ENGINE IDENTSFU SELECTFU RESETTMA INPUT (ARINC 429)SELECT EFISCONFIGURATION
ARINC 429 INPUT
INTERROGATE
ERASE
5V INTEGRAL
LIGHTING SUPPLY
28V DC STANDBY
BUS NO. 1
28V DC BATTERY
BUS NO. 2
EIS Primary Display Schematic DiagramFigure 4
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