Garmin Cirrus Perspective SR20, Pilot'S Manual

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190-00820-08 Rev. A
Cirrus Perspective
™
by Garmin – Pilot’s Guide for the SR20/SR22/SR22T
573
ADDITIONAL FEATURES
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
8.12 HYPOXIA RECOGNITION WITH AUTOMATIC DESCENT MODE
The optional Hypoxia Recognition detects pilot incapacitation due to the affects of hypoxia or other physical
condition. This is accomplished by monitoring pilot interaction with the Perspective
™
system. If the system
determines the pilot is not responding, Automatic Descent Mode is activated placing the aircraft in a descent to a
lower altitude to provide the pilot and passengers an opportunity to recover from the effects of hypoxia.”
The system is operative when the aircraft altitude is above 14,900 feet (pressure altitude) and the GFC 700
autopilot is engaged. Pilot interaction with the Perspective ™ system is monitored by detecting key presses and
turns of the knobs (Audio Panel and push-to-talk switch excluded) . If a period of inactivity (time dependent on
altitude, see Figure 8-109) is detected, Hypoxia Recognition initiates and automatic descent.
Upon activation, there are three sequential phases employed by the system; determining pilot alertness, descent
to 14,000 feet MSL, and descent to 12,500 feet MSL.
DETERMINING PILOT ALERTNESS
When the system detects a sufficient period of inactivity (Figure 8-109) the Advisory Annunciation ‘ ARE
YOU ALERT?’ is displayed. Selecting the ALERT Softkey will acknowledge the message and reset the system.
Pressing any other softkey, or turning a knob will also reset the system.
When no pilot interaction is detected for an additional 60 seconds, the Caution Annunciation ‘HYPOXIA
ALERT’ is displayed. Again, selecting the ALERT Softkey will acknowledge the message and reset the system.
Pressing any other softkey, or turning a knob will also reset the system.
When no pilot interaction is detected for an additional 60 seconds, the Warning Annunciation ‘AUTO
DESCENT’ is displayed in the Annunciation Window and ‘Automatic descent to 14,000FT in 60 seconds’ is
displayed in the Alerts Window. Once again, selecting the
ALERT Softkey will acknowledge the message and
reset the system. Pressing any other softkey, or turning a knob will also reset the system.
When no interaction is detected for another 60 seconds, the system will automatically proceed with the
descent.
Figure 8-109 Hypoxia Recognition Activation Times
10
15
20
25
30
35
e
of
U
se
fu
l C
on
ci
ou
sn
es
s
(m
in
)
0
5
10
15
20
25
30
35
15000 18000 21000 24000 27000 30000
Time
of
U
se
fu
l C
on
ci
ou
sn
es
s
(m
in
)
Aircraft Altitude (ft)
Aircraft Altitude (Feet)
Period of Detected Inactivity (Minutes)