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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
5.
Performance
INTRODUCTION
The flight management system (FMS) performance computations are
based on initialization data, flight plan, and input from aircraft systems.
With this information, the FMS controls a variety of mission planning
and speed control functions for the helicopter.
The multifunction control display unit (MCDU) pages that control
performance are similar to the navigation pages. As a general rule,
when the system supplies the information, items are displayed in small
characters. Items are displayed in large characters when the pilot
makes an entry.
Several areas of initialization are within the performance functions of
the FMS. For the FMS to calculate performance data, the initialization
pages must be reviewed and the CONFIRM INIT prompt at 6R on the
last page of initialization must be pushed. Performance calculations can
take some time to be displayed after initializing or after the flight
condition is changed.
NOTE:
Performance information in the FMS is based on data
entered by the pilot and calculated by the FMS. Mission
planning data has not been evaluated by the Federal Aviation
Administration (FAA) for accuracy and is not approved by the
FAA.
FMS fuel quantities are displayed two different ways. When showing
current fuel on board, the quantity is in pounds or kilograms (for
example: 16250). When showing planned fuel remaining at waypoints
and fuel required, the quantity is displayed in thousands of pounds or
kilograms (e.g., 2.7, meaning 2,700). Fuel quantities reflecting the
gauge value are displayed in pounds or kilograms. Fuel quantities
associated with the flight plan are displayed in thousands of pounds or
kilograms.
NOTE:
The FMS fuel management data is advisory information only.
FMS fuel management data must not be used in lieu of the
primary fuel flow indicator display of the aircraft.
A28- - 1146- - 181
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
Performance
5-1
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