Piper ARCHER II Pilot Operating Handbook page 231

DQ-17-005
Page: 4 of 8
1.3. The GPS receiver meets the performance requiremenis of ETSO C146a (en route, terminal,
and approach).
1.4. Navigation is accomplished using the WGS-84 (NAD-83) coordinate reference datum.
Navigation data is based upon use of only the Global Positioning System (GPS) operated by
the United States of America.
1.5. Pilot's Guide for GNS400W: 190-00356-00 Rev. J (or later version).
Pilot's Guide for GNS500W (including TAWS): 190-00357-00 Rev. J (or later version).
This pilot's guide must be immediately available to the flight crew whenever navigation is
predicated on the use of the system. in addition to the Pilot's Guide, the appropriate Pilot's
Guide Addendum and Supplements must be immediately available to the flight crew if lightning
detection, Traffic Advisory System (TAS), or if primary means oceanic/remote navigation is
conducted.
1.6 This change is does not introduce TAWS-B, however an existing GNS unit with TAWS-B
installed under a pre-existing approved change can be upgraded to GNS-W unit.
1.7 Installations with existing TAWS-B only:
1. The primary function of the TAWS-B portion of the system is to provide terrain situational
awareness. TAWS-B functions are:
o Excessive Descent Rate Alert (GPWS mode 1)
o Negative Climb Rate After Take-off Alert (GPWS mode 3)
o Altitude advisory aural alert message "Five-Hundred" (GPWS mode 6)
o Premature Descent Alert (PDA)
o Forward Looking Terrain Avoidance (FLTA)
= Reduced Required Terrain Clearance
= Reduced Required Obstacle Clearance
«Imminent Terrain impact
=» imminent Obstacle Impact
2. TAWS audio is routed to the direct un-switched input of each pilot's audio system.
3. TAWS visual warnings are shown on the GNS530W-TAWS or via a dedicated annunciation
control panel (if installed).
TERR
NHB
DF 2¢
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