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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
VNAV Approach Temperature Compensation
VNAV approach temperature compensation is an option for the FMS
and is not available unless enabled. The following page entries specific
to the temperature compensation functionality are not displayed when
the VNAV approach temperature compensation function is not enabled.
For VNAV approaches, the flight crew has the option of selecting VNAV
temperature compensation to ensure the FMS meets obstacle
clearance standards by using the published altitude constraints. The
VNAV temperature compensation function adjusts all FMS waypoint
altitude constraints for the defined approach, approach transitions, and
missed approach segments of the flight plan to compensate for
nonstandard day temperatures.
The flight crew configures the FMS for three states of VNAV approach
temperature compensation:
1. Off (assumes standard day temperature).
2. COLD applies temperature compensation only when approach is
flown in cold conditions (0 to --50 degrees DISA).
3. HOT/COLD applies temperature compensation when approach is
flown in any temperature condition (limited to --50 to 70 degrees
DISA). This option configuration must be enabled separately from
COLD.
Procedure 7--2 is an example of the steps necessary for configuring the
FMS for the VNAV approach temperature compensation mode.
Step
Procedure 7- -2 FMS Temperature Compensation
1
Select MAINTENANCE from page 2 of NAV INDEX.
2
Select SETUP from page 2 of FMS X MAINTENANCE.
3
Select FLIGHT on FMS SETUP.
4
Go to Page 2 of FLIGHT CONFIG pages.
5
The FLIGHT CONFIG page is displayed, shown in
Figure 7--12.
Flight Plan
7-30
Honeywell International Inc. Do not copy without express permission of Honeywell.
Configuration
A28- - 1146- - 181
REV 3 Mar 2009
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