User's Manual Part 1

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CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
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1--70
(c) Mode 3: Excessive Altitude Loss after Take--off
This mode provides, as derived from RTCA DO--161A, an alert when there is a
loss of altitude after take -- off or during a missed approach. Figure 1--21 shows
Mode 3 -- Loss of Altitude After Take Off Envelope.
Figure 1--21. Mode 3 -- Excessive Altitude Loss After Take Off Envelope
(d) Mode 4: Incorrect Aircraft Configuration with regard to Terrain
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CAS meets the requirement for Mode 4 alerts as defined in RTCA DO-- 161A.
Mode 4 applies during the landing phase of flight and results in the annunciation
of an alert in the event of insufficient terrain clearance when the aircraft is not in
the proper landing configuration. Mode 4 consists of the following two
sub-- modes:
• Mode 4A, when the landing gear is up
• Mode 4B, when the landing gear is down, but the flaps are not in landing
configuration
Figure 1-- 22 shows Mode 4 -- Unsafe Terrain Clearance Envelope.