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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
PERFORMANCE INITIALIZATION
Several FMS performance functions require initialization. When the
related initialization selection is complete, the CONFIRM INIT prompt
must be selected to compute the performance data for these functions.
The PERFORMANCE INIT 1/3 page, shown in Figure 5--2, is displayed
by pushing the PERF INIT prompt on the PERF INDEX page.
One of the following performance modes is selected to complete
performance initialization.
Pilot Speed/Fuel Flow -- The FMS uses pilot--entered speed
D
schedules and winds to perform time calculations. The fuel
calculations are based on pilot--entered cruise fuel flow.
Adjustments are made for the higher fuel flow in climb.
Current Ground Speed/Fuel Flow -- The fuel calculations are
D
based on the current fuel flow shown on the FUEL MGT page. When
a fuel flow entry is made on the FUEL MGT page, the entry takes
the place of the sensed fuel flow. The time calculations are based
on the current ground speed when airborne. While on the ground,
the FMS uses the default ground speed.
Figure 5--3 shows the sequence of initialization and and data pages for
each of the two methods of performance calculations.
NOTE:
The pilot must verify and review all the entered and computed
data.
A28- - 1146- - 181
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
Figure 5- -2
PERFORMANCE INIT Display
Performance
5-3
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