Airplane Flight Manual Supplement

190-00682-02 Rev. C Hawker Beechcraft C90A and C90GT King Air
Page 39 of 95
• The airplane symbol is removed from all maps. The map will remain centered at the last
known position. “NO GPS POSITION” will be annunciated in the center of the map.
GPS APPROACH ALARM LIMITS EXCEEDED
During a GPS LPV, LNAV/VNAV, or LNAV+V approach, if the Horizontal or Vertical alarm limits
are exceeded, the G1000 System will downgrade the approach. This will be annunciated in the
ALERTS window and by an annunciation change on the HSI from LPV, L/VNAV, or LNAV+V to
LNAV. GPS glide path vertical guidance will be removed from the PFD. The approach may be
continued using the LNAV only minimums.
During any GPS approach in which both precision and non-precision alarm limits are exceeded,
the G1000 System will flag the lateral guidance and display a system message “ABORT
APPROACH loss of navigation”. Immediately upon viewing the message, the unit will revert to
Terminal navigation mode alarm limits. If the position integrity is within these limits lateral
guidance will be restored and the GPS may be used to execute the missed approach, otherwise
alternate means of navigation must be utilized.
LOSS OF RADIO TUNING FUNCTIONS
1. COM Frequency Toggle Button ..................................PRESS AND HOLD FOR 2 SECONDS.
NOTE
This procedure will tune the active COM field to the emergency frequency 121.5. Certain
failures of the tuning system will automatically tune 121.5 without pilot action.