Section 3. Emergency Procedures; Emergency Procedures; Abnormal Procedures - Garmin 400W Series Supplemental Flight Manual

GARMIN Ltd. or its subsidiaries
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AIRPLANE FLIGHT MANUAL SUPPLEMENT
or SUPPLEMENTAL AIRPLANE FLIGHT MANUAL
for a Garmin 400W Series Navigation System

Section 3. EMERGENCY PROCEDURES

3.1

Emergency Procedures

No change.
3.2

Abnormal Procedures

a) If the Garmin 400W Series unit GPS navigation information is not
available, or is invalid, utilize other remaining operational navigation
equipment installed in the airplane as appropriate. If the 400W Series unit
loses GPS position and reverts to Dead Reckoning mode (indicated by
the annunciation of "DR" in the lower left of the display), the moving
map will continue to be displayed. Aircraft position will be based upon
the last valid GPS position and estimated by Dead Reckoning methods.
Changes in airspeed or winds aloft can affect the estimated position
substantially. Dead Reckoning is only available in Enroute mode;
Terminal and Approach modes do not support DR.
b) If a "Loss of Integrity" (INTEG) message is displayed during:
Enroute/Terminal: continue to navigate using GPS equipment and
periodically cross-check the GPS guidance to other approved
means of navigation.
GPS Approach: GPS approaches are not authorized under INTEG
- Execute missed approach or revert to alternate navigation.
c) During a GPS LPV precision approach or GPS LNAV/VNAV approach,
the 400W Series unit will downgrade the approach if the Vertical alarm
limits are exceeded. This will cause the vertical guidance to flag as
unavailable. The procedure may be continued using the LNAV only
minimums.
d) During a GPS LP approach, the 400W Series may downgrade the
approach prior to the Final Approach Fix if alarm limits are exceeded. If
this occurs, a message will be displayed advising the pilot to use LNAV
minimums. If alarm limits are exceeded after the Final Approach Fix, the
400W Series unit will flag the lateral guidance and generate a system
message "ABORT APPROACH loss of navigation". Immediately upon
viewing the message the unit will revert to Terminal alarm limits. If the
position integrity is within these limits lateral guidance will be restored
190-00356-03 Rev. B
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