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tab when pressure drop across the gascolator reaches 0.8 ± 0.2 PSI.
The filter is bypassed when the pressure drop reaches 1.20 ± 0.2 PSI.
Once the pop-up tab is activated, the fuel filter element must be
replaced and the pop-up tab manually reset. Do not attempt to clean
the filter element.
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Section 9 Cirrus Design
Supplements SR20
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P/N 11934-S38 1 of 10
Cirrus Design Section 9
SR20 Supplements
Pilots Operating Handbook and
FAA Approved Airplane Flight Manual
Supplement
For
Garmin 400W-Series GPS Navigator
When a Garmin 400W-Series GPS Navigator is installed in the Cirrus
Design SR20, this Supplement is applicable and must be inserted in
the Supplements Section (Section 9) of the Cirrus Design SR20 Pilot's
Operating Handbook. This document must be carried in the airplane at
all times. Information in this supplement either adds to, supersedes, or
deletes information in the basic SR20 Pilot's Operating Handbook.
• Note •
This POH Supplement Change, dated Revision 01: 11-11-07,
supersedes and replaces the original release of this POH
Supplement dated 08-15-07.
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Section 9 Cirrus Design
Supplements SR20
Section 1 - General
The WAAS-enabled, Garmin 400W-Series GPS Navigator is capable
of providing primary navigation information for enroute, terminal, nonprecision,
and precision approaches with typical position accuracies of
1 meter horizontally and 2 meters vertically.
The Wide Area Augmentation System (WAAS) consists of ground
reference stations positioned across the United States that monitor
GPS satellite data. Two master stations, located on either coast,
collect data from the reference stations and create a GPS correction
message. This correction accounts for GPS satellite orbit and clock
drift plus signal delays caused by the atmosphere and ionosphere.
The corrected data is then broadcast through geostationary satellites.
WAAS also provides the capability of quickly determining when signals
from a given satellite are wrong and removing that satellite from the
navigation solution using Receiver Autonomous Integrity Monitoring
(RAIM), a technology developed to assess the integrity of GPS
signals.
• Note •
WAAS satellite coverage is only available in North America.
User in other parts of the world can receive WAAS data,
however, the signal has not been corrected and thus does not
improve the accuracy of your receiver.
Models Covered
Two Garmin 400W-Series GPS Navigators are covered in this
publication; the GNC 420W and GNS 430W. Generally, both models
will be referred to as the Navigator, except where there are physical or
operational differences.
• Note •
For detailed descriptions and full operation instructions for the
GNC 420W or GNS 430W Navigators, refer to the Garmin
400W-Series GPS Navigator Pilot's Guide and Reference, P/N
190-00356-00, Revision A or later revision.
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Cirrus Design Section 9
SR20 Supplements
SR20_FM09_1285
SR20_FM09_1109
Figure - 1
GNC 420W and GNS 430W 400W-Series Navigators
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Section 9 Cirrus Design
Supplements SR20
Section 2 – Limitations
1. The Garmin 400W-Series GPS Navigator Pilot's Guide and
Reference, P/N 190-00356-00, Revision A or later must be
immediately available to the pilot during flight. The software status
stated in the pilot's guide must match that displayed on the
equipment.
2. IFR enroute and terminal navigation is prohibited unless the pilot
verifies the currency of the database or verifies each selected
waypoint for accuracy by reference to current approved data.
3. The Garmin 400W-Series GPS Navigator meets RNP5 (BRNAV)
requirements of AC 90-96 and is in accordance with AC 20-138,
and JAA AMJ 20X2 Leaflet 2 Revision 01, provided it is receiving
usable navigation information from the GPS receiver.
4. Do not use the TERRAIN Interface for navigation of the aircraft.
The Terrain Display does not provide TAWS capability and is
intended to serve as a situational awareness tool only and does
not provide the accuracy fidelity on which to solely base terrain or
obstacle avoidance maneuvering decisions.
Section 3 - Emergency Procedures
1. If GPS Navigator information is not available or is invalid, utilize
remaining operational navigation equipment as required.
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