Piper ARCHER II Pilot Operating Handbook page 233

AFMS-1259-01
2.8.
2.9.
2.10.
2.11
3
DQ-17-005
Page: 6 of 8
Instrument approaches using the GPS receiver must be conducted in the GPS Approach mode
(automatically selected at the final approach fix (FAF) and RAIM must be available at the FAF.
Use of the GPS receiver to fly approaches, not approved for GPS, is prohibited.
If not previously defined, the following default settings must be made in the "AUX Pages,
SETUP Page, UNITS/POSITION" menu option prior to operation: refer to the pilot's guide for
procedure if necessary:
. dis, spd kt (sets navigation units to "nautical miles" and "knots")
. alt, vs ft fpm (sets altitude units to "feet" and "feet per minute')
. map datum WGS 84 (sets map datum to WGS-84, see note below)
. posn deg-min (sets navigation grid units to decimal minutes)
NOTE: In some areas outside the United States, datum other than WGS-84 or NAD-83 may be
used. If the GNS-W unit is authorized for use by the appropriate Airworthiness authority, the
required geodetic datum must be set in the GNS-W prior to its use for navigation.
Installations with existing TAWS-B only:
Navigation must not be predicated upon with the use of the TAWS.
NOTE: The terrain display is intended to serve as a situational awareness tool only. It may not
provide either the accuracy or fidelity, or both, on which to solely base decisions and plan
manoeuvres to avoid terrain or obstacles.
To avoid giving unwanted alerts, the TAWS must be inhibited when landing at an airport that is
not included in the airport database.
Pilots are authorized to deviate from their current ATC clearance to the extent necessary to
comply with terrain/obstacle warnings from TAWS.
The TAWS database has an area of coverage from North 75° Latitude to South 60° Latitude in
all longitudes.
NOTE: The area of coverage may be modified, as additional terrain data sources become
available.
Abnormal / Emergency Procedures
For detailed operating instructions, refer to the Pilot's Guide and optional displays addendum.
3.1
3.2
DF 29
'RAIM Position Warning' message displayed or 'Loss of Integrity - Cross Check Nav' message
displayed. Discontinue use of the GNS-W and use another suitable source of navigation.
Installations with existing TAWS-B only:
If a terrain awareness CAUTION occurs, take positive corrective action until the alert ceases.
Stop descending or initiate either a climb or a turn, or both, as necessary, based on analysis of
all available instruments and information.
if a terrain awareness WARNING occurs, immediately initiate and continue a climb that will
provide maximum terrain clearance, or any similar approved vertical terrain escape manoeuvre,
until all alerts cease. Only vertical manoeuvres are recommended, unless either operating in
visual meteorological conditions (VMC), or the pilot determines, based on all available
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