Installation Manual

Table Of Contents
Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Appendix D Page D-13
Table D-3: Failure Classification
Functional Description
Hazard Classification
Failure Condition
Class B TAWS Mode 3
Incorrect TAWS Caution
Alert
AC 23-18 §7.d(2)(c)
False Caution alert due to undetected or
latent failures. Crew confusion with terrain
situation. Crew initiates corrective maneuver
immediately
Significant increase in crew workload
Un-annunciated loss of all
FLTA Terrain or Obstacle
alerts (RTC and/or ITI)
AC 23-18 §7.d(2)(c)
Failure of the function to provide all warning
alert messages (Aural, Visual, and Terrain
Display). Crew uses visual cues and any
other available information to avoid terrain.
Increased risk of CFIT.
Significant increase in crew workload
False FLTA Terrain or
Obstacle Warning Alert
AC 23-18 §7.d(2)(b)
False Warning alert due to undetected or
latent failures. Crew confusion with terrain
situation. Crew initiates corrective maneuver
immediately
Significant increase in crew workload
Class B TAWS (all
modes) Un-annunciated
loss of all Alerts
AC 23-18 §7.d(2)(a)
Failure of the function to provide the
required alerting functions. Crew uses visual
clues and any other available information to
avoid terrain. Increased risk of CFIT.
Significant increase in crew workload