Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
A28--1146--181
REV 3 Mar 2009
System Components
3-12
Honeywell International Inc. Do not copy without express permission of Honeywell.
D
Degraded (DGR)
-- DGR is an alerting annunciator. This
annunciator is displayed or lit when the FMS cannot guarantee the
position accuracy for the present phase of flight due to sensor
availability. The approved sensors for the flight phases are listed in
Table 3--2.
Table 3--2
Approved Sensors for Flight Phase
Approved Sensors
(Navigation Mode)
Flight Phase
GPS
DME/DME
VOR/DME
Departure or
Terminal
X
X
X
En route
X
X
X
Oceanic
X
X
X
VOR/DME or VOR
Approach
X
X
X
GPS Approach
X
NDB Approach
X
X
The DGR annunciator is displayed on the horizontal situation
indicator (HSI) or primary flight display (PFD) page when both of the
following conditions are valid:
—
The sensors being used for navigation are not approved for the
current phase of flight.
—
The FMS is the selected aircraft navigation source on EDS.
Summary of Contents for FMZ Series
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