TBM
PILOT’S OPERATING HANDBOOK
700
SECTION 2
LIMITATIONS
EASA Approved
Page 2.6.2
Edition 1 -- November 30, 2010
Rev. 0
GPS NAVIGATION LIMITS
Data base updating must be verified before each flight.
The navigation sources required for the anticipated flight shall be serviceable
and allow an immediate crossed check on available ground aids or shall allow
to return to primary navigation sources in case of GPS navigation loss.
Use of GPS as a navigation source is
PROHIBITED
, unless the pilot verifies
the currency of the data base and the coordinates of each selected waypoint.
The aircraft is approved for Enroute and Terminal operations including
RNP5/BRNAV and PRNAV (RNP--1) in accordance with JAA TGL--10,
provided the FMS is receiving usable navigation information from one or
more GPS receivers.
The two GARMIN G1000 GPS receivers installed on the aircraft are
approved under TSO C145a Class 3. The GARMIN G1000 system has been
demonstrated capable of, and has been shown to meet the accuracy
requirements for Enroute, Terminal, non--precision instrument approach
operations using GPS and WAAS (including “GPS” or “GPS and RNAV
approaches”), and approach procedures with vertical guidance (including
“LNAV/VNAV”, “LNAV+V”, and “LPV”) within the U.S. National Airspace
System in accordance with AC 20--138A.
Procedures during flight preparation
During flight preparation, the pilot must get information about GPS
constellation, via aeronautical data (consultation of GPS NOTAM).
When less than 24 satellites are available (or less than 23 if equipment uses
pressure altitude information), the pilot must make sure that RAIM function is
available on the projected route and for the flight period in B--RNAV areas.
RAIM function prediction can be done using prediction software integrated
into G1000 system or any other approved software such as the one provided
for the users by EUROCONTROL on INTERNET.
If a loss of RAIM function is predicted on the chosen route for a period of more
than 5 minutes, the flight cannot be done. In that case, the flight will either be
postponed or another route will be chosen. The prediction software must then
be used again.
