Tecnam P92 Echo MK2 - Page 88

P92 LSA
Flight Manual
2
Introduction
This Supplement shows the main features, characteristics and procedures to operate the Garmin
AFCS. The operator must be fully aware of all the official documentation provided by GARMIN
concerning the autopilot system.
Section 1 - General
An Automatic Flight Control System (AFCS) is typically comprised of two major components: A
Flight Director (FD) and Autopilot servos. The Flight Director provides pitch and roll commands to
the autopilot servos. These pitch and rolls commands are displayed on the PFD as Command Bars.
When the Flight Director is active the pitch and roll commands can be hand-flown by the pilot or
when coupled with the autopilot, the autopilot servos drive the flight controls to follow the commands
issued by the Flight Director. The Flight Director operates independently of the autopilot servos, but
in most cases the autopilot servos can not operate independent of the Flight Director. On G3X
installations that do not have a separate and independent Flight Director, the Flight Director is always
coupled to the autopilot. As shown, the main autopilot components are the G3X displays, the
GMC305 mode controller, the elevator servo GSA28 and roll servo GSA 28. The Tecnam P92MKII
also includes the interface components such as A/P Master Switch, control rods and related
components. The Tecnam P92MKII is equipped with an AP MASTER switch. It is not provided with
T/O - GO AROUND mode switch. This must be taken into account when performing the procedures
described in the Garmin Pilot's guide. G3X can communicate with Garmin AFCS. On Tecnam P92
MKII, the GMC305 mode controlled is installed to provide the most flexible way to control the
autopilot modes and functions.
The main control button functions of GMC305 are:
1) Heading Select Mode;
2) Navigation Mode;
3) AP engage/disengage;
4) LEVEL mode;
5) Nose UP/DN wheel to adjust the mode reference in pitch hold, vertical speed, indicated
airspeed, and altitude hold;
6) IAS Mode select/deselect;
7) ALT Mode select/deselect;
8) VNV Mode select/deselect;
9) VS Mode select/deselect;
10) YAW DAMPER - NOT ACTIVE;
11) Flight Director Mode select/deselect;
12) APR Mode select/deselect;