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747-400 MAINTENANCE MANUAL
b) The analog displacement of the thermometers is linear between the equally spaced flap detents (0, 5, 10, 20, 25, 30).
c) Adjustment of the TE flap thermometers to the flap lever position analog bars (single flap indicator) does not occur on the multiple flap-primary indicator.
d) The color of the respective flap position thermometer changes from white to amber if a flap disagree, asymmetry or shutdown condition occurs.
e) If the left or right (inbd or outbd) TE flap position input is invalid, the respective thermometer contains a small amber colored letter x centralized within the thermometer outline.
(d) Multiple Flap-Alternate Indicator 1) Flap Lever a) The flap lever position analog bar and digital readout are not displayed. 2) LE Flaps
a) LE flap positions are indicated in the same manner as described above for the multiple flap-primary indicator.
3) TE Flaps
a) TE flap positions are indicated in a similar manner as described above for the multiple flap-primary indicator.
b) The TE flap thermometer envelope includes TE flap detent index markers. These TE flap detent ticks provide a marked flap position scale for alternate flap extension.
(19)
Total Fuel Quantity/Fuel Temperature
(a) Total fuel quantity and fuel temperature are displayed by white colored alphanumeric readouts. Fuel quantity is displayed in units of kgs x 1000 and temperature in units of °C. If the EICAS message FUEL TEMP (advisory) is displayed, the fuel temperature readout will change to amber in color.
(20)
Fuel To Remain
(a)
During fuel jettison, a fuel to remain indicator will be displayed in place of the fuel temperature readout.
(b)
The TO REMAIN caption and fuel to remain readout is displayed only if valid fuel to remain data is received from the FJCC.
(c)
During jettison, the readout is magenta in color. When jettison is complete, the readout changes from magenta to white in color. Once the readout changes to white, it will blink at a rate of four times a second for five seconds.
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747-400
MAINTENANCE MANUAL
(21) Cabin Pressure Data
(a) Duct pressure (psi), cabin altitude (feet), cabin rate (sea level ft/min), cabin differential pressure (psi) and landing altitude (feet) are displayed if any of the following conditions occur:
-Manual landing altitude selected.
-Duct pressure readout is amber in color
-
Cabin altitude readout is amber or red in color.
-
Cabin differential pressure readout is amber or red in color.
-EICAS secondary-full, ESC synoptic or ECS real time maintenance format is selected on the auxiliary DU.
-Any of the following EICAS messages are displayed:
~................................. | CABIN ALT AUTO | (caution) | ................................... | LANDING ALT | (advisory) | ................................... | OUTFLOW VLV L | (advisory) | ................................... | OUTFLOW VLV R | (advisory) | ................................... | BLD DUCT LEAK L | (caution) | ................................... | BLD DUCT LEAK R | (caution) | ................................... | BLEED LOSS LEFT | (advisory) | ................................... | BLEED LOSS RIGHT | (advisory) | 2..................…..............1
(b)
The Duct Pressure (DUCT PRESS) readout is white in color for pressure greater than 11 psi. For pressure less than or equal to 11 psi, the readout is amber in color.
(c)
The Cabin Altitude (CAB ALT) readout is white in color for CAB ALT less than or equal to 8,500 ft, amber in color for CAB ALT between 8,500 and 10,000 ft, and red in color for CAB ALT greater than or equal to 10,000 ft.
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