Mooney M20M, Pilot Operating Handbook

Page: 296 / 377

GI 275 Part 23 AML STC
190-02446-12 Rev. 4
Airplane Flight Manual Supplement Page 56 of 70
7.14.4 Airspeed
If configured, the airspeed tape on the left side of the ADI displays red/white
striping to indicate the maximum allowable airspeed (V
NE
/V
MO
). This maximum
allowable airspeed display is configured to indicate the appropriate maximum
allowable airspeed for the airplane.
The airspeed tape displays a red low-speed awareness band at the lower range of
the airspeed tape. This low-speed awareness band is displayed at airspeed values
below V
S0
. It does not indicate an actual or calculated stall speed and does not
adjust with variations in aircraft weight or other factors.
All other airspeed tape indications are configured to indicate the type design
limitations. The airspeed tape does not adjust these additional markings for
variations with aircraft weight, altitude, or other factors.
Airspeed references (“V speeds”) are shown on the airspeed tape when enabled
for display by the pilot via Menu → Options → Airspeeds.
7.14.5 Barometric Altitude and Vertical Speed
If configured, barometric altitude is displayed on a tape on the right side of the
display. The vertical speed is displayed via an inset window adjacent to the
altitude numerical value. The Baro setting may be adjusted by touching the field
and rotating the inner knob or simply rotating the knob when the active field
reverts to the Baro field home state. Altitude, airspeed, and heading bugs may
be configured and synchronized across all GI 275 ADIs and configured G500
TXi displays. The Altitude bug may be removed by adjusting the value to -1,000
ft.
If a GTN is interfaced to provide Vertical Navigation (VNAV) functionality,
then barometric altitude is required. Baro sync should be enabled on GI 275
units. VNAV uses the pilot-side baro setting unless that GI 275 fails, in which
case the co-pilot side baro setting will be used (if installed).
7.14.6 Navigation
Navigation information is presented on the ADI using an optional lateral
deviation indicator (LDI) above the heading display and a VDI to the left of the
altitude readout. For MFD installations, the CDI/VDI are shown on CDI, HSI,
and HSI map pages. Additionally, the CDI/VDI are displayed on the HSI and
HSI map page on HSI installations. Bearing Pointers may be displayed on the
HSI Page.
Navigation information can be cycled through up to four independent sources in
normal operation by pressing the “CDI” button at the bottom of the HSI, HSI
Map, or CDI pages. The navigation source can also be changed using the NAV
Option Menu on the ADI (Menu → Options). VGPS will be displayed as an
additional navigation source if all certified navigators fail or will be the only
navigation source in installations without a certified GPS source. The selected