
Garmin G1000 Cockpit Reference Guide for the Socata TBM 850
190-00708-00 Rev. A
SECTION 12 – ABNORMAL
OPERATION
12-2
12.3 UNUSUAL ATTITUDES
The PFD ‘declutters’ when the aircraft enters an unusual
attitude. Only the primary functions are displayed in
these situations.
The following information is removed from the PFD
(and corresponding softkeys are disabled) when pitch ex-
ceeds +30˚/-20˚ or bank exceeds 65˚:
• Traffic Annunciations
• Flight director
Command Bars
• Inset Map
• Temperatures
• DME Information
Window
• Wind Data
• Selected Heading Box
• Selected Course Box
• Transponder Status
Box
• System Time
• PFD Setup Menu
• Windows displayed in
the lower right corner
of the PFD:
– Timer/References
– Nearest Airports
– Flight Plan
– Messages
– Procedures
• Barometric Minimum
Descent Altitude Box
• Glideslope, Glidepath,
and Vertical Deviation
Indicators
• Altimeter Barometric
Setting
• Selected Altitude
• VNV Target Altitude
Red extreme pitch warning chevrons pointing toward
the horizon are displayed starting at 50 degrees above and
30 degrees below the horizon line.
Figure 12-2 Extreme Pitch Indication
12.4 STORMSCOPE OPERATION WITH
LOSS OF HEADING INPUT
If heading is lost, strikes and/or cells must be cleared
manually after the execution of each turn. This is to
ensure that the strike and/or cell positions are depicted
accurately in relation to the nose of the aircraft.
12.5 HAZARD DISPLAYS WITH LOSS OF
GPS POSITION
If GPS position is lost, or becomes invalid, selected
hazards being displayed on the Navigation Map Page are
removed until GPS position is again established. The
icons in the lower right of the screen, indicating the
selected functions for display, now show an ‘X’, as shown
in Figure 12-3.
Figure 12-3 Loss of Hazard Functions with Loss of GPS Position
12.6 DEAD RECKONING
WARNING: DR Mode is inherently less accurate
than the standard GPS/WAAS Mode due to the
lack of satellite measurements needed to deter-
mine a position. Changes in wind speed and/or
wind direction compound the relative inaccuracy
of DR Mode. Because of this degraded accuracy,
the crew must maintain position awareness using
other navigation equipment until GPS-derived
position data is restored.
While in Enroute or Oceanic phase of flight, if the
G1000 detects an invalid GPS solution or is unable to
calculate a GPS position, the system automatically reverts
to Dead Reckoning (DR) Mode. In DR Mode, the G1000
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