AFMS N°D07 FOR GARMIN GFC700 AUTOPILOT AND VARIABLE PITCH PROPELLER EQUIPPED
AEROPLANES
Section 1 – General-
AUTOPILOT FUNCTIONS
13.2.2 NON ALTITUDE CRITICAL MODES (VS, VNAV, IAS)
When the airspeed trend vector (dedicated algorithm) reaches 65 +/- 2 KIAS a single aural
―AIRSPEED‖ will sound, alerting the pilot to the impending under- speed condition, which
requires pilot action.
If the aircraft is allowed to decelerate to an IAS below the minimum commandable autopilot
airspeed (65 Kts for P2010), a red ―UNDERSPEED PROTECT ACTIVE‖ annunciation appear
to the right of the vertical speed indicator
Vertical flight director mode will change from active to armed, Flight Director and autopilot
will command the aircraft to pitch down until reaching a pitch attitude at which IAS equals at
least the minimum commandable autopilot airspeed, avoiding the development of a stall condi-
tion.
When airspeed increases (as a result of adding power/thrust) to an IAS above 70 KIAS, USP
will then disengage and the autopilot will command the aircraft to pitch up until recapturing
the vertical reference (vertical vertical flight director mode will switch from white armed to
green active).
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