Daher-Socata TBM 900 Pilot's Information Manual page 531

PILOT'S OPERATING HANDBOOK
NEGATIVE CLIMB RATE AFTER TAKEOFF ALERT (NCR)
The purpose of the Negative Climb Rate (NCR) After Takeoff alert (also referred to as "Altitude Loss After
Takeoff") is to provide suitable alerts to the pilot when the system determines that the airplane is loosing altitude
(closing upon terrain) after takeoff. The aural message "Don't sink" is given for NCR alerts, accompanied by an
annunciation and a pop-up terrain alert on the display. NCR alerting is only active when departing from an airport
and when the following conditions are met :
- The height above the terrain is less than 700 feet.
- The distance from the departure airport is 2 Nm or less.
- The heading change from the heading at the time of departure is less than 110 degrees.
Figure 9.49.3 shows two figures which illustrate the NCR alerting parameters as defined by TSO-C151b.
The NCR alert is issued when the altitude loss and height are within the range in the first figure, or when the sink
rate (negative vertical speed) and height are within the range in the second figure.
Edition 1 -- October 31, 2013
Rev. 0
Figure 9.49.3 - Negative Climb Rate (NCR) Alert Criteria
SUPPLEMENT 49
"GARMIN" G1000 TAWS SYSTEM
Page 9.49.9