PILOT’S OPERATING HANDBOOK
SECTION 3
EMERGENCY PROCEDURES
EASA Approved
Edition 0 -- October 31, 2013
Rev. 1
Page 3.9.10
DUAL GPS/SBAS FAILURE (AMBER ”DR” OR ”LOI”) ON HSI (2/2)
If no Alternate Navigation Sources are available :
Dead Reckoning (DR) Mode - Active when the airplane is greater than 30 NM from the destination airport :
1 - Navigation
USE THE AIRPLANE SYMBOL,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAGENTA COURSE LINE ON THE MAP DISPLAY
AND THE AMBER CDI FOR COURSE INFORMATION
NOTE :
-
All information normally derived from GPS turns amber. All of this information will become less
accurate over time.
-
TAWS is inoperative.
-
DR mode uses heading, true airspeed, last known wind data, and the last known GPS position to
estimate the airplane’s current position. DR information will be available for a maximum of
20 minutes.
-
MAP – TRAFFIC MAP display is not dependent on GPS information.
The position of displayed traffic relative to the airplane symbol on the map is still accurate.
Loss Of Integrity (LOI) Mode - Active when the airplane is within 30 NM or departure airport (as calculated
from the previous GPS or DR position)
1 - Navigation
FLY TOWARDS KNOWN VISUAL CONDITIONS,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
USE ATC OR OTHER INFORMATION SOURCES AS POSSIBLE
NOTE :
-
All information derived from GPS or DR will be removed from the displays.
-
TAWS is inoperative.
-
The airplane symbol is removed from all maps. The map will remain centered at the last known
position. ”NO GPS POSITION” will be annunciated in the center of the map.
