Garmin GTN 635 Installation Manual page 28

Discrepancies that invalidate a procedure must be reported to Garmin International. The affected
procedure is prohibited from being flown using data from the Navigation database until a new Navigation
database is installed in the aircraft and verified that the discrepancy has been corrected. Navigation
then select ―Aviation Data Error Report.‖
database discrepancies can be reported at FlyGarmin.com
then select ―NavData
Flight crew and operators can view Navigation database alerts at FlyGarmin.com
Alerts.‖
For flight planning purposes, in areas where SBAS coverage is not available, the pilot must check RAIM
availability. Within the United States, RAIM availability can be determined using the Garmin WFDE
Prediction program, Garmin part number 006-A0154-05 (included in GTN trainer) software version 3.00
or later approved version with Garmin approved antennas or the FAA's en route and terminal RAIM
prediction website: www.raimprediction.net, or by contacting a Flight Service Station. Within Europe,
RAIM availability can be determined using the Garmin WFDE Prediction program or Europe's AUGER
GPS RAIM Prediction Tool at http://augur.ecacnav.com/augur/app/home. For other areas, use the Garmin
WFDE Prediction program. This requirement is not necessary if SBAS coverage is confirmed to be
available along the entire route of flight. The route planning and WFDE prediction program may be
downloaded from the Garmin website on the internet. For information on using the WFDE Prediction
Program, refer to Garmin WAAS FDE Prediction Program, part number 190-00643-01, ‗WFDE
Prediction Program Instructions'.
For flight planning purposes, operations within the U.S. National Airspace System on RNP and RNAV
procedures when SBAS signals are not available, the availability of GPS RAIM shall be confirmed for the
intended route of flight. In the event of a predicted continuous loss of RAIM of more than five minutes
for any part of the intended route of flight, the flight should be delayed, canceled, or rerouted on a track
where RAIM requirements can be met.
For flight planning purposes for operations within European B-RNAV/RNAV 5 and P-RNAV airspace, if
more than one satellite is scheduled to be out of service, then the availability of GPS RAIM shall be
confirmed for the intended flight (route and time). In the event of a predicted continuous loss of RAIM of
more than five minutes for any part of the intended flight, the flight should be delayed, canceled, or
rerouted on a track where RAIM requirements can be met.
Applicable to dual installations consisting of two GTNs: For flight planning purposes, operations where
the route requires Class II navigation the aircraft's operator or pilot-in-command must use the Garmin
WFDE Prediction program to demonstrate that there are no outages on the specified route that would
prevent the Garmin GNSS navigation system from providing GPS Class II navigation in oceanic and
remote areas of operation that requires (RNP-10 or RNP-4) capability. If the Garmin WFDE Prediction
program indicates fault exclusion (FDE) availability will exceed 34 minutes in accordance with FAA
Order 8400.12A for RNP-10 requirements, or 25 minutes in accordance with FAA Order 8400.33 for
RNP-4 requirements, then the operation must be rescheduled when FDE is available.
Both Garmin GPS navigation receivers must be operating and providing GPS navigation guidance for
operations requiring RNP-4 performance.
Applicable to dual installations consisting of two GTNs: North Atlantic (NAT) Minimum Navigational
Performance Specifications (MNPS) Airspace operations per AC 91-49 and AC 120-33 require both
GPS/SBAS receivers to be operating and receiving usable signals except for routes requiring only one
Long Range Navigation sensor. Each display computes an independent navigation solution based on its
GPS sensor.
Whenever possible, RNP and RNAV routes including Standard Instrument Departures (SIDs) and
Obstacle Departure Procedures (ODPs), Standard Terminal Arrival (STAR), and en route RNAV ―Q‖ and
RNAV ―T‖ routes should be loaded into the flight plan from the database in their entirety, rather than
loading route waypoints from the database into the flight plan individually. Selecting and inserting
individual named fixes from the database is permitted, provided all fixes along the published route to be
flown are inserted. Manual entry of waypoints using latitude/longitude or place/bearing is prohibited.
Page 1-16 GTN 625/635/650 TSO Installation Manual
Rev. C 190-01004-02