CIRRUS DESIGN SR20, Pilot Operating Handbook

Page: 423 / 508

P/N 11934-S23 3 of 8
Cirrus Design Section 9
SR20 Supplements
Section 2 - Limitations
1. The GARMIN GNC 420 Pilot's Guide and Reference, P/N 190-
00140-20, Revision B dated August 2002 (or later appropriate
revision) must be immediately available to the flight crew
whenever navigation is predicated on the use of the GPS
Navigator. The software status stated in the pilot's guide must
match that displayed on the equipment.
2. The Navigator must utilize software version 2.XX (where XX is a
digit 0-9).
3. 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.
4. GPS instrument approaches must be accomplished in accordance
with approved instrument approach procedures that are retrieved
from the Navigator’s NavData database. The database must
incorporate the current update cycle.
a. Instrument approaches must be conducted in the approach
mode and RAIM must be available at the Final Approach Fix.
b. Accomplishment of ILS, LOC, LOC-BC, LDA, SDF, and MLS
approaches are not authorized in GPS mode.
c. When an alternate airport is required by the applicable
operating rules, it must be served by an approach based on
other than GPS navigation, the aircraft must have operational
equipment capable of using that navigation aid, and the
required navigation aid must be operational.
5. The aircraft must have other approved navigation equipment
installed and operating appropriate to the route or flight.
6. The Garmin GNS 420 meets RNP5 (BRNAV) requirements of
AC 90-96 and is in accordance with AC 20-138, and JAA AMJ
20X2 Leaflet 2 Revision 1, provided it is receiving usable
navigation information from the GPS receiver.
Revision 1: 05-25-05