Garmin G1000 ユーザーズマニュアル

190-00498-07 Rev. A

Garmin G1000 Pilot’s Guide for Cessna Nav III

SYSTEM OVERVIEW

STEM

VER

VIEW

FLIGHT

INSTRUMENTS

EIS

AUDIO P

ANEL

& CNS

FLIGHT

MANA

GEMENT

HAZARD

OID

ANCE

AFCS

ADDITIONAL FEA

TURES

APPENDICES

INDEX

Attitude/Heading Invalid

AHRS

no-GPS

Mode

AHRS Normal

Operation

AHRS no-

Mag Mode

AHRS no-Mag/

no-Air Mode

Heading Invalid

ailab

una

ilab

una

vailab

ailab

una

ilab

una

ilab

ailab

Air Data

Magnetometer Data

una

ilab

ailab

GPS Data

Magnetometer Data

Air Data

Figure 1-12 AHRS Operation

GPS INPUT FAILURE

NOTE:

In-flight initialization of AHRS, when operating without any valid source of GPS data and at true

air speed values greater than approximately 200 knots, is not guaranteed. Under these rare conditions, it
is possible for in-flight AHRS initialization to take an indefinite amount of time which would result in an
extended period of time where valid AHRS outputs are unavailable.

Two GPS inputs are provided to the AHRS. If GPS information from one of the inputs fails, the AHRS uses

the remaining GPS input and an alert message is issued to inform the pilot. If both GPS inputs fail, the AHRS
can continue to provide attitude and heading information to the PFD as long as magnetometer and airspeed
data are available and valid.

MAGNETOMETER FAILURE

If the magnetometer input fails, the AHRS continues to output valid attitude information; however, the

heading output on the PFD is flagged as invalid with a red ‘X’.

AIR DATA INPUT FAILURE

Failure of the air data input has no affect on the AHRS output while AHRS is receiving valid GPS

information. Invalid/unavailable airspeed data in addition to GPS failure results in loss of all attitude and
heading information.