Garmin Software Version 0670.12 Podręcznik Użytkownika Pobierz pdf (Strona 34)

Garmin G1000 Cockpit Reference Guide for the Diamond DA42NG

190-00963-03 Rev. A

AFCS

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InstrumentsEIS

Nav/Com/

XPDR/AudioAFCSGPS Nav

Flight

PlanningProcedures

Hazard

Avoidance

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Abnormal

Operation

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AlertsAppendixIndex

If the aircraft continues to decelerate, Underspeed Protection becomes active.

Vertical ﬂight director modes can be divided into two categories: Those in which it

is important to maintain altitude for as long as possible (altitude-critical modes), and

those in which maintaining altitude is less crucial (non-altitude critical modes).

Altitude-Critical Modes (ALT, GS, GP, TO, GA, FLC)

When the aircraft decelerates to stall warning, the lateral and vertical ﬂight director

modes will change from active to armed, and the autopilot will provide input causing

the aircraft to pitch down and the wings to level.

An aural “AIRSPEED” alert will sound every ﬁve seconds and a red “USP ACTIVE”

annunciation will appear to the right of the Vertical Speed Indicator (see Annunciations

& Alerts). The pitch down force will continue until the aircraft reaches a pitch attitude

at which IAS equals the IAS at which stall warning turns off, plus two knots.

When airspeed increases (as a result of adding power/thrust) to above the IAS at

which stall warning turns off, plus two knots, the autopilot will cause the aircraft to

pitch up until recapturing the vertical reference and the vertical and lateral ﬂight

director modes will change from armed to active.

Non-Altitude Critical Modes (PIT, VS, VNAV, IAS)

When the aircraft decelerates to an IAS below the minimum commandable autopilot

airspeed, a red “USP ACTIVE” annunciation will appear to the right of the Vertical

Speed Indicator. The vertical ﬂight director mode will change from active to armed,

and the autopilot will cause the aircraft to pitch down until reaching a pitch attitude at

which IAS equals the minimum commandable autopilot airspeed.

When airspeed increases (as a result of adding power/thrust) to an IAS above the

minimum commandable autopilot airspeed, the autopilot will cause the aircraft to

pitch up until recapturing the vertical reference and the vertical ﬂight director mode

will change from armed to active.

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