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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-62-00-306
Altitude Indication
The altitude indication shows barometric altitude from the air
data inertial reference system (ADIRS) and other related
altitude information from various systems.
Altitude Tape and Current Altitude
The altitude tape shows the barometric altitude on a moving
scale. It can show a range of 806 feet. The current altitude
shows in a digital readout box. The digital readout box points to
the value on the altitude tape.
Selected Altitude and Altitude Alert
There is a selected altitude bug and a digital readout. The pilot
uses the mode control panel to set the selected altitude. The
bug points to the selected altitude on the altitude tape. When the
selected altitude is offscale, only half the bug shows at the top
or bottom of the altitude tape. The selected altitude digital
readout shows above the altitude tape.
When the airplane approaches the selected altitude, there is an
altitude alert. When there is an altitude alert, a white box shows
around the selected altitude digital readout.
See digital flight control system section for more information
about altitude alert. (SECTION 22-11)
Metric Altitude and Metric Selected Altitude
When you select MTRS on the EFIS control panel, the altitude in
meters shows as a digital value above the digital readout box.
The selected altitude in meters also shows. It shows above the
selected altitude digital readout.
Landing Altitude Indications
The landing altitude indication shows as a crosshatched area
on the altitude tape.
A landing altitude reference bar shows the height above
touchdown. From 0 to 500 feet above landing altitude, the bar is
amber. From 500 to 1000 feet, the bar is white.
Altitude Disagree Message
If the captain and first officer altitudes are different by more than
200 feet, the amber ALT DISAGREE message shows at the
bottom of the altitude tape.
Selected Barometric Minimums
There is a selected barometric minimum bug and a digital
readout. The pilot selects the barometric minimum from the
EFIS control panel. The bug points to the selected barometric
minimum value on the altitude tape. The digital readout shows
below the attitude display and shows BARO above the value.
CDS - PFD - ALTITUDE INDICATIONS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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If the barometric minimums alert is active and the airplane
descends through the selected BARO altitude these displays
change to amber:
* Barometric minimums bug
* The word BARO
* Digital display.
To reset the alert, the pilot does one of these:
* Climb above the selected barometric minimums
* Push the RST button on the EFIS control panel
* Land.
To make the barometric minimums displays blank, the pilot
does one of these:
* Push the reset (RST) button on the EFIS control panel while
the switch is set to BARO minimums
* Select radio minimums on the EFIS control panel to make the
BARO minimums digital value blank. The BARO minimums
bug stays in view.
* Select BARO minimums of -1000 feet or more.
Barometric Reference
You select the barometric reference from the EFIS control
panel, and it shows below the altitude tape. If you select the
barometric reference in inches, IN shows next to the digital
barometric reference value. If you select the barometric
reference in hectopascals, HPA shows next to the digital
barometric reference value. If you select the standard
barometric reference, STD shows.
QFE shows to the right of the digital barometric reference.
CDS - PFD - ALTITUDE INDICATIONS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-62-00-302
CDS - PFD - ALTITUDE INDICATIONS
CDS - PFD - ALTITUDE INDICATIONS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-62-00-302
CDS - PFD - ALTITUDE INDICATIONS
CDS - PFD - ALTITUDE INDICATIONS
EFFECTIVITY
SHZ ALL 31-62-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
　
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