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Aural “OBSTACLE AHEAD” Caution
Aural “CAUTION, TERRAIN” Caution
Aural “SINK RATE” Caution
Aural “DON’T SINK” Caution
Aural “TOO LOW, TERRAIN” Caution
1. Take positive corrective action until the alert ceases. Stop
descending, or initiate a climb turn as necessary, based on
analysis of all available instruments and information.
PULL UP
TERRAIN
Original Issue: 05-13-08
4 of 6 P/N 13772-136
Section 9 Cirrus Design
Supplements SR22
Section 4 - Normal Procedures
Normal operating procedures are outlined in the Cirrus Perspective
Integrated Flight Deck Pilot’s Guide.
Alert Priority
When any of the TAWS aural alerts are in progress, all aural TRAFFIC
alerts are inhibited.
Advisory Callout
The advisory callout “FIVE HUNDRED”, occurs at approximately 500
feet AGL.
Section 5 - Performance
No Change.
Section 6 - Weight & Balance
No Change.
Section 7 - System Description
The Terrain Awareness/Warning System receives data from the GPS
receiver to determine horizontal position and altitude and compares
this information to the onboard terrain and obstacle databases to
calculate and “predict” the aircraft’s flight path in relation to the
surrounding terrain and obstacles. In this manner, TAWS provides
advanced alerts of predicted dangerous terrain conditions via aural
alerts communicated thru the pilot’s headset and color-coded terrain
annunciations displayed on the PFD.
Refer to the Cirrus Perspective Integrated Flight Deck Pilot’s Guide for
a additional information on the system and its operating modes.
Original Issue: 05-13-08
P/N 13772-136 5 of 6
Cirrus Design Section 9
SR22 Supplements
System Constraints
System test at startup: Aural tone lasting approximately one second
indicates successful completion of internal system test.
Red TAWS FAIL Warning
Aural “TAWS SYSTEM FAILURE” Warning
1. TAWS power-up self-test has failed or TAWS has detected
problems with database validity, hardware status, and/or GPS
status.
White TAWS N/A Advisory
Aural “TAWS NOT AVAILABLE” Advisory
Should the 3-D GPS navigation solution become degraded or if the
aircraft is out of the database coverage area, the annunciation ‘TAWS
N/A’ is generated in the annunciation window and on the TAWS Page.
The aural message “TAWS NOT AVAILABLE” is generated. When the
GPS signal is re-established and the aircraft is within the database
coverage area, the aural message “TAWS AVAILABLE” is generated.
Geometric Altitude versus Measured Sea Level
TAWS uses information provided from the GPS receiver to provide a
horizontal position and altitude. This data serves as the reference for
color-coding for the TAWS Page and as an input to the TAWS Hazard
Avoidance algorithms. Because it is derived from GPS, Geometric
Altitude may differ from corrected barometric altitude. Therefore,
Geometric Altitude may be in error by as much as 100 ft and should
not be used for navigation.
TAWS FAIL
TAWS N/A
Original Issue: 05-13-08
6 of 6 P/N 13772-136
Section 9 Cirrus Design
Supplements SR22
Original Issue: 05-13-08
Intentionally Left Blank
13772-138 1 of 4
Cirrus Design Section 9
SR22 Supplements
Pilot’s Operating Handbook and
FAA Approved Airplane Flight Manual
Supplement
for
Enhanced Vision System
When the Enhanced Vision System is installed on the aircraft, this
POH Supplement is applicable and must be inserted in the
Supplements Section (Section 9) of the basic Pilot’s Operating
Handbook. This document must be carried in the airplane at all times.
Information in this supplement adds to, supersedes, or deletes
information in the basic Pilot’s Operating Handbook.
Original Issue: 07-29-08
2 of 4 13772-138
Section 9 Cirrus Design
Supplements SR22
Section 1 - General
No Change.
Section 2 - Limitations
Enhanced Vision System
1. The Enhanced Vision System (EVS) cannot be used for flight
guidance, navigation, traffic avoidance, or terrain avoidance.
Maneuvering the airplane in any phase of flight such as taxi,
takeoff, approach, landing, or roll out shall not be predicated on
EVS imagery. The EVS shall only be used as an aide to assist the
flight crew to visually acquire objects normally viewed through the
cockpit windows.
2. The Max Viz Enhanced Vision System Information Manual, P/N
309100024 Revision 01 or later must be available to the pilot
　
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