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OPERATOR’S
MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
Page
A-137
November 19, 2009
METRIC ALT [5R]:
CMA-9000 FMS system altitude, displayed in meters. Displayed only if selected in the
display configuration.
QNH SET [6L]:
Displayed when no baro-corrected altitude is received from the ADC and either a pressure or an
IRS baro-inertial altitude is available. Displayed, in small font, when a baro-correction (QNH) is received from an
external source. Otherwise, allows the entry of a barometric correction (QNH) in inches of mercury (in Hg) with a
range from 27.0 to 32.0 in Hg or in millibars (mb) with a range from 915 to 1083 mb. When a QNH altimeter
setting is entered, a correction is applied to the pressure altitude and the resulting baro-corrected value is
displayed as ALT(CORR) (LSK 5L). The displayed unit (mb or inHg) can be toggled via LSK 6L when the
scratchpad is empty.
This field is also displayed, in small font, when both the QNH and baro-corrected altitude are received by the
FMS. This field is not displayed when the baro-corrected altitude is received but no external QNH is available to
the FMS. This field is not displayed when the altitude source is GPS, INS or manual.
QNH REF [6R]:
Displayed only when the Pressure Altitude input from the ADC is available, Hybrid INS/GPS
navigation solution from the EGI is computed and available, the INS/GPS AAIM altitude is not failed, and the
QNH SET field is displayed.. Displays a computed value of the mean sea-level (QNH) pressure as a reference
value to the pilot. The units of this field will be slave to the selected unit on the QNH SET (LSK 6L) field. This
field is right justified. Both fields display asterisks if the ADC or INS/GPS is failed or blanks if no altitude data is
received.
NOTE:
The manually entered altimeter setting is cancelled and the field displays dashes ("--.--") on leaving
the terminal area (distance from the departure airport is greater than 33 nm, or the altitude is greater
than 16,000 feet above airport elevation.)
When no altimeter setting is defined, field displays boxes ("
") on entering the terminal area
(distance from the destination airport is less than 30 nm, or the altitude is less than 15,000 feet above
airport elevation). This indicates a mandatory input is required.
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