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C20035
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747-400
MAINTENANCE MANUAL
(3)
Uplift Density
(a) Uplift density is displayed by a digital readout in units of kilograms/liter. Uplift density is received from the FQPU.
(4)
Total Fuel Quantity
(a) Displayed by a white colored digital readout enclosed by a box. Total fuel quantity is displayed in units of kgs X 1000.
(5)
Fuel Temperature
(a) Displayed by white colored digital readouts including a sign. Fuel temperature is displayed in units of °C (Celsius).
(6)
Fuel Quantity
(a) Displayed by white colored digital readouts in units of kgs x 1000. Fuel quantity values are displayed for the center and stabilizer tanks, main tanks 1 thru 4 and reserve tanks 2 and
3.
(7)
Fuel Density
(a) Displayed by white colored digital readouts in units of kilograms/liter. Fuel density values are displayed for the center and stabilizer tanks, main tanks 1 thru 4 and reserve tanks 2 and 3.
(8)
Probe Capacitance
(a) Displayed by white colored digital readouts in units of picofarads.
(9)
Compensator Capacitance (COMP)
(a) Displayed by white colored digital readouts in units of picofarads. The compensator capacitors are used to compensate for slight variations in fuel density, fuel dielectric and fuel volume due to changes in temperature.
(10)
Hi Z Shield Cable Capacitance
(a) Displayed by digital readouts in units of picofarads. The cable capacitance data is received from the FQPU.
(11)
Volume Top-Off (VTO)
(a) Displayed by white colored digital readouts in units of liters. The VTO setting value indicates the amount of fuel required to fill the fuel tanks.
D. EICAS ECS (Air Conditioning System) Maintenance Display (Fig. 51)
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ZONE
TEMPERATURE
TARGET TEMPERATURE
AIR CONDITIONING SYSTEM: ECS___ AUTO
DUCT
F/DU/D A B C D E FWD AFTBULK TEMPERATURE
ZONE TEMP 25 25 25 25 25 25 25 25 25 25
TRIM VALVE TARGET TEMP 25 25 25 25 25 25 25 POSITION
DUCT TEMP 25 25 25 25 25 25 25
TRIM AIR
TRIM VAL POS 0.35 0.35 0.35 0.35 0.35 0.35 0.35
PRESSURE
TRIM AIR PRESS 10
PACK OUTLET TEMPERATURE
123
PACK OUTLET TEMP 10 10 10
PACK FLOW
PACK FLOW 7 7 7
TURBINE BYPASS
RAM AIR INLET VALVE POSITION
TBV POSITION 0.65 0.65 0.65
DOOR POSITION COMPRESSOR RAI POSITION 0.35 0.35 0.35 OUTLET
RAM AIR EXIT
RAE POSITION 0.35 0.35 0.35
TEMPERATURE
DOOR POSITION COMP OUTLET TEMP 175 175 175
PTC CHANNEL
IN CONTROL
PTC CHANNEL IN CONT A A A
A/C TEMP ZONE DATE 02SEP90 GMT 18:54:04
EICAS ECS (Air Conditioning System) Maintenance Display
Figure 51
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(1)
General
(a)
ECS (Environmental Control System) parameters for zone temperature, target temperature, duct temperature, trim valve position, trim air pressure, pack outlet temperature, pack flow, turbine bypass valve position, compressor inlet/outlet temperatures and pack temperature controller channel in control are presented for display.
(b)
Zone temperature, target temperature, duct temperature and trim valve position are displayed for the flight deck, upper deck, cabin zones A-E and the forward, aft and bulk cargo compartments. A single aft cargo area configuration (combined cargo heat or conditioning) is displayed whenever the aft cargo temperature input from the Zone Temperature Controller (ZTC) is valid, or the bulk cargo heat is disabled, otherwise, both the aft and bulk cargo compartment values will be displayed.
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