Mooney M20M, Pilot Operating Handbook

Page: 258 / 377

GI 275 Part 23 AML STC
190-02246-12 Rev. 4
Airplane Flight Manual Supplement Page 18 of 70
FAA APPROVED
Standby and/or Primary Flight Instruments
Do not use a QFE altimeter setting with this system. System functions will not
operate properly with a QFE altimeter setting. Use only QNH altimeter setting
for height above mean sea level, or the standard pressure setting, as applicable.
 This installation does not have separate standby instruments or does not
require standby instruments (aircraft limited to VFR).
 This installation uses the GI 275 as the primary flight display
instrument and uses pneumatic instruments, the aircrafts original flight
instruments, or a different electronic display as the standby flight
display.
 This installation uses a connected GI 275 system with independent
ADHARS and backup batteries for the primary and standby flight
instruments. IFR flight must not be initiated unless the systems check
in Section 2.7 is completed successfully to verify the following:

The backup battery is operational and sufficiently charged. Refer
to Section 2.7.

Attitude, heading, altitude, and airspeed from AHRS/ADC 1 are
operational on the pilot’s primary GI 275 ADI with no warnings,
cautions, or advisories present

Selecting the Reversion Backup Switch to the “ON” position
causes the standby GI 275 to change and lock to the ADI page,
and displays primary flight information.
 This installation uses a GI 275 ADHARS and backup batteries for the
standby flight instruments to a separate primary flight display. IFR
flight must not be initiated unless the systems check in Section 2.7 is
completed successfully to verify the following:

The GI 275 backup battery is operational and sufficiently
charged. Refer to Section 2.7.

Attitude, heading, altitude, and airspeed from AHRS/ADC 1 are
operational on the pilot’s primary GI 275 ADI with no warnings,
cautions, or advisories present
WARNING
Failure to observe these limitations may result in the loss of all
attitude or air data or both, resulting in loss of aircraft control
during flight in IMC.