7.7 - Use of Autothrottle
General
The Autothrottle (AT) function is fully integrated with the Automatic Flight Control
System (AFCS) and is associated with the Single Engine Indicator (SEI). AT
automatically actuates the THROTTLE to control engine power within operational
limits, in order to reach and maintain the manually selected airspeed (MAN mode)
or programmed flight phase schedule (FMS mode).
For more information on AT modes and cockpit controls, refer to the Garmin Pilot’s
Guide, Autothrottle section.
For more information on the SEI, refer to
Paragraph Engine Monitoring in
and to the Garmin Pilot’s Guide, Engine Indication System (EIS)
section.
AT Engine and Airspeed Protections
The AT function includes engine and airspeed protections to enhance flight safety.
AT engine and airspeed protections automatically activate if necessary, both when
the AT is engaged and when the AT is disengaged.
AT engine and airspeed protections are automatically inhibited below 400 ft AGL.
The default setting for the AT engine and airspeed protections is ON at avionics
power up. The ESP system and the AT engine protection system must remain ON
for all normal operations. If necessary, for a specific training maneuver or
maintenance check, these systems can be temporarily turned off with the Stability
& Protection button in the avionics setting of the GTC menu. The
ESP OFF
advisory CAS message indicates that the AT engine protection system and the
ESP system protections are OFF. Following completion of the training maneuver
or maintenance check turn ESP on.
AT Engine Protections
AT engine protections automatically reduce engine power, to ensure that ITT
never remains above 840 °C in flight.
Section 7
Description
Pilot's Information Manual
PIM TBM 960 - Edition 0
Rev. 01
Page 7.7.1
PIM - DO NOT USE FOR FLIGHT OPERATIONS
