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(GCU 475) on the pedestal is the primary FMS
interface on the MFD. It includes controls for selection
and manipulation of moving map functions such as
range and pan. In addition each PFD contains FMS flight
planning capabilities via bezel mounted controls and soft
keys. Each PFD calculates and displays the current
flight plan using the onside GPS sensor. Automatic GPS
sensor reversion occurs in the event the onside sensor
is degraded or failed.
Airway flight planning, plain language identifiers and airport
communication and navigation frequency lookup
features are included. Flight plans may be created,
stored, accessed, and activated as needed and are
shown on the MFD moving map. Both lateral and vertical
modes (to the final approach fix) may be displayed
and coupled to the autopilot. Present position referenced
geopolitical and airspace boundaries, and airways may
be overlaid on any of the FMS map formats.
Precision guidance from the FMS meets the operational
requirements of oceanic/remote, NAT MNPS, RNP10,
and RNP5/BRNAV. The navigation database requires
periodic updates via subscription and must be uploaded
to the aircraft through the upper SD flash card port on
each of the three displays.
L. Automatic Flight Control System (AFCS)
Automatic flight control is provided in the Mustang by the
Garmin GFC 700 system. The autopilot system (AP)
includes dual flight director computers (integrated in the
Interface Adapter Units), a single Garmin Mode
Controller (GMC 710), and four electric servos for roll,
yaw, pitch, and pitch trim.
The GMC 710 Mode Controller, located just below the
glareshield, enables the selection of flight director and
autopilot modes for either pilot. The AFCS modes may
be hand flown using the flight director command bars or
coupled to the autopilot for automatic flight. Selection of
the autopilot will automatically enable the flight director.
Modes of operation include attitude, heading, altitude,
speed, and vertical speed, as well as VNAV and the various
NAV radio and GPS navigation modes. In addition,
the AFCS provides a takeoff/go-around mode activated
by buttons on either throttle handle. Touch control steering
(TCS) and AP disconnect functions are controlled via
switches on each yoke.
The pitch trim servo also provides electric pitch trim
when the autopilot is not engaged, through yoke mounted
trim switches. The yaw servo may be activated by the
pilot during normal maneuvers to provide Dutch roll
damping and turn coordination. Or, it will automatically
engage with autopilot activation.
M. Transponders
Two Garmin solid-state Mode S transponders are linked
to the interface adapter units: one diversity (GTX 33D)
and one non-diversity (GTX 33). Each provides
enhanced surveillance data link and includes ATC based
Traffic Information System (TIS) for display on the MFD
and the PFD inset map. Altitude reporting information is
supplied from the digital ADCs. Each transponder is
mounted in the integrated avionics racks behind the
PFDs and tuned through the PFDs.
N. Weather Avoidance Radar
The Garmin GWX 68 digital weather avoidance radar is
a four-color weather detection sensor consisting of an
integrated receiver/transmitter/12-inch antenna unit controlled
through and displayed on the MFD. The system
provides 6,500 watts of nominal transmitter power, 90
degree scan angle, ±15 degrees tilt, a maximum range
10. FLIGHT COMPARTMENT, I N S T RUMENTATION AND AVIONICS
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of 320 nm and a minimum range of 2.5 nm. The system
also includes several additional features:
• Penetration Compensation compensates for radar signal
attenuation or shadowing caused by heavy precipitation.
• Automatic Tilt Compensation automatically adjusts the
tilt angle with changes in altitude.
• Target Alert notifies the pilots of significant weather
beyond the selected range.
• Pilot selectable Flight Path Scan narrows the scan range
to ±10, 20, or 30 degrees and increases the scan rate.
• Ground Mapping depicts terrain features with a separate
color scheme from the weather modes.
• Pilot selectable receiver gain.
• Adjustable brightness.
O. Broadcast Weather Presentation
The Garmin GDL 69A, located in the nose, links weather
information through XM WX Satellite Weather Data
Services for display on the G1000 MFD. Such products as
high resolution NEXRAD, winds aloft, lightning, textual
METARs and TAFs provide pilots with comprehensive situational
　
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