Mooney M20M, Pilot Operating Handbook

Page: 303 / 377

GI 275 Part 23 AML STC
190-02446-12 Rev. 4
Airplane Flight Manual Supplement Page 63 of 70
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An annunciator located in the upper right corner of all
configured pages on ADI, HSI and MFD units provides text
annunciations of alert conditions.

For all GI 275 configurations which provide alerts and all
configurations where the GI 275 is interfaced to a GTN with TAWS-B
enabled:
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If a terrain alert occurs and the MFD is not selected to the
dedicated terrain page, then a terrain “popup window” is
provided, which depicts the obstruction generating the alert
with controls provided to either go to the dedicated terrain
page, inhibit the terrain alert, or close the popup window. On a
primary ADI GI 275, if a terrain alert occurs, an annunciation
will illuminate in the top right corner of the display.
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The terrain page and map page, if the terrain overlay is
enabled, will depict the area or obstruction causing the alert as
an area of color corresponding to the alert severity and
encircling the obstruction.
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If Synthetic Vision depiction is turned on, an area
corresponding to the alert area on the map/terrain page is
shaded in the corresponding color for terrain alerts. Obstacle
alerts will cause the relevant obstacle to be depicted in the
alert color in SVT. Powerline alerts do not have a
corresponding indication in SVT.
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In Dual ADI installations, GI 275 generated alert audio is only
provided by the Pilot side GDU. If the Pilot side GDU
becomes inoperative, the Co-Pilot side GDU visual
annunciations may still function, but the aural alerts will not be
heard.
Controls are provided for terrain, obstacle, and wire alerts as follows:

For all GI 275 configurations in which the GI 275 system provides
alerts:
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Controls are provided in the Terrain Page menu. A “Terrain
Inhibit” button inhibits terrain, obstacle, and powerline alerts
when pressed. An annunciation is provided on all configured
pages to indicate that alerts are inhibited. A “Terrain Test”
button initiates a self-test sequence which results in aural and
visual self-test annunciations.