Lynx NGT-9000s
Installation Manual
1.7.4 Failure Classification
Table 1-8 summarizes the potential hazards associated with the Lynx NGT-9000s functions and the
associated failure condition severity classifications per AC 23.1309-1E.
Table 1-8: Failure Classification
Functional
Description
Hazard Classification Failure Condition
TAS Traffic Advisory Major
AC 120-55C, §12.b.(1)
Relative position of traffic associated with
Traffic Advisory is incorrectly indicating
(either visually or aurally or both).
Per operational procedures crew will not
deviate from assigned clearance based
only on TA information.
Confusion of crew to locate traffic
associated with advisory.
Significant increase in workload on crew.
Mode S Transponder
Response to SSR and
TCAS Interrogations
Major
TSO-C112d §3.b.
Incorrect reply to an SSR or TCAS
interrogation.
Significant reduction in safety margins or
functional capabilities
ADS-B Output Major
AC 20-165A, Appendix 1, §cc
TSO-C166b, § 3.b
TSO-C154c, § 3.b.
Incorrect position or velocity data reported
to ground surveillance system providing
aircraft separation services.
Significant reduction in safety margins.
Enhanced Visual
Acquisition (EVAcq)
Basic Airborne Traffic
Situational Awareness
(AIRB)
Major
AC 20-172A, § 2-7.d.
TSO-C166b, § 3.b
TSO-C154c, § 3.b.
TSO-C195a, § 3.b
Traffic is incorrectly displayed relative to
own ship position on the CDTI or displayed
traffic information is incorrect.
Crew confusion with traffic situation.
Flight crew uses visual cues and ATC
traffic advisories or instructions to avoid
traffic.
Significant increase in crew workload.
1.8 MODIFICATIONS
Modifications (MODS) are identified by an entry on the I.D tag on individual units. A list of
modifications to the Lynx NGT-9000s is identified below:
Table 1-9: Hardware Modifications
MOD # EFFECTIVITY / COMPLIANCE DESCRIPTION
None
0040-17001-01 General Information Page 1-19
Revision A January 15, 2015
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