Piper ARCHER II Pilot Operating Handbook page 234

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information, that turning in addition to the vertical escape manoeuvre is the safest course of
action, or both.
The TAWS Forward Looking Terrain Avoidance (FLTA) and Premature Descent Alerts (PDA)
functions may be inhibited to stop alerting for acceptable flight conditions (such as below glide
slope manoeuvres). Pilots should use discretion when inhibiting TAWS and always remember
to enable the system when appropriate. Only the FLTA and PDA alerts are disabled in the inhibit
mode; GPWS modes 1, 3 and 6 remain active.
Normal Procedures
Refer to the GNS-W's Pilot's Guide.
Particularly in installations that do not have dedicated annunciators in the primary field of view,
pilots must take care to ensure that they monitor carefully the annunciator and system status
messages on the front of the GNS-W unit.
Installations with existing TAWS-B only:
During power-up, check that the terrain/obstacle database versions are displayed along with a
disclaimer to the pilot. At the same time, as TAWS self-test begins, check that the "TAWS
System Test OK" aural messages is generated.
If the unit's navigation information is not available or invalid, utilize remaining operational
navigation equipment as required. In this situation, TAWS will not be available; a white 'TER
N/A' or red 'TER FAIL' annunciator will be displayed in the lower left corner of the unit's display.
If "RAIM position warning" message is displayed the unit will flag and no longer provide GPS
based navigational guidance. The crew should revert to the unit's VOR/ILS receiver or an
alternate means of navigation other than the unit's GPS receiver. TAWS will not be available
and a white 'TER N/A' status annunciator will be displayed by the unit.
It the white "TER N/A" status annunciator is displayed by the unit, the system will no longer
provide TAWS alerting or display relative terrain elevations. The crew must maintain compliance
with procedures that ensure minimum terrain separation.
If the red "TER FAIL" status annunciator is displayed by the unit, the system will no longer
provide TAWS alerting or display relative terrain elevations. The crew must maintain compliance
with procedures that ensure minimum terrain separation.
\f a"TAWS has failed" message is displayed by the unit, the system will no longer provide TAWS
alerting or display relative terrain elevations. The crew must maintain compliance with
procedures that ensure minimum terrain separation.
Performance
No change from basic aircraft handbook.
Weight and Balance/Equipmenit List
Refer to revised aircraft weight and balance information provided by the installation
organisation.
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