Dual Gps/Sbas Failure (Amber "Dr" Or "Loi") On Hsi (1/2 - Daher-Socata TBM 900 Pilot's Information Manual

SECTION 3
PILOT'S OPERATING HANDBOOK
EMERGENCY PROCEDURES
EASA Approved

DUAL GPS/SBAS FAILURE (AMBER "DR" OR "LOI") ON HSI (1/2)

LOSS OF GPS/SBAS NAVIGATION DATA
When both GPS/SBAS receivers are inoperative or GPS navigation information is not available or invalid, the
G1000 system will enter one of two modes : Dead Reckoning mode (DR) or Loss Of Integrity mode (LOI). The
mode is indicated on the HSI by an amber "DR" or "LOI".
Which mode is active depends on the distance from the destination airport in the active flight plan.
If the LOI annunciation is displayed, revert to an alternate means of navigation appropriate to the route and phase
of flight.
In Dead Reckoning mode, the MAP – NAVIGATION MAP will continue to be displayed with a ghosted airplane icon
in the center and an amber 'DR' overwriting the icon. Airplane position will be based upon the last valid GPS
position, then estimated by Dead Reckoning methods. Changes in true airspeed, altitude, or winds aloft can affect
the estimated position substantially. Dead Reckoning is only available in Enroute mode; Terminal and Approach
modes do not support DR. Course deviation information will be displayed as an amber CDI on both PFDs and will
remain for up to 20 minutes after GPS position data has been lost. The autopilot and/or flight director may be
coupled in GPS mode while the system is in Dead Reckoning mode.
Refer to the G1000 Cockpit Reference Guide for further information.
Revert to an alternate means of navigation appropriate to the route and phase of flight.
If Alternate Navigation Sources (ILS, LOC, VOR, DME, ADF) are available :
1 - Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . USE ALTERNATE SOURCES
Edition 0 -- October 31, 2013 Page 3.9.9
Rev. 1