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Doc # DA202-C1 April 06, 2010 Page S13 - 9
Revision 25 DOT Approved
DA20-C1 Flight Manual
3.3 Abnormal Indications
3.3.1 Heading Failure
A magnetometer failure is indicated by a HDG with a red X over it just to the left of the heading display. If the GDU620 is still receiving valid GPS ground track from the GNS navigator, the heading will be replaced with GPS ground track in magenta. The aircraft can be flown by reference to GPS ground track instead of heading. In this case, the autopilot will continue to fly in HDG mode, but the course being sent to the autopilot will be based on ground track instead of magnetic heading.
A complete Heading Failure (magnetometer and GPS ground track failure) is indicated by the digital heading presentation being replaced with a red X and the compass rose digits being removed. The course pointer will indicate straight up and operate much like a traditional CDI with the Omni-Bearing Selector being adjusted by the PFD knob set to CRS.
Under this condition, the pilot must use an alternate source of heading such as the standby compass. If the installation includes an autopilot, the pilot workload may be reduced by operating that system in NAV mode.
3.3.2 AHRS Failure
A failure of the AHRS is indicated by a removal of the sky/ground presentation, a red X, and a yellow "AHRS FAILURE" shown on the PFD. A heading failure will also occur as described above in 3.3.1.
1.
Set course datum using CRS selection of the PFD knob
2.
Seek VFR conditions or land as soon as practical.
3.3.3 Air Data Computer (ADC) Failure
Complete loss of the Air Data Computer is indicated by a red X and yellow text over the airspeed, altimeter, vertical speed, TAS and OAT displays. Some derived functions, such as true airspeed and wind calculations, will also be lost.
1.
Use Standby Airspeed Indicator and Altimeter
2.
Seek VFR conditions or land as soon as practical.
3.4 Loss of Electrical Power
In the event of a total loss of electrical power, the G500 system will cease to operate and the pilot must utilize the standby instruments to fly the aircraft.
DA20-C1 Flight Manual
3.5 WARNINGS, CAUTIONS, and Advisories
The following tables show the color and significance of the warning, caution, and advisory messages which may appear on the G500 displays.
NOTE
The G500 cockpit reference guide and the G500 pilot's guide contain detailed descriptions of the annunciator system and all warnings, cautions and advisories.
WARNING annunciations - Red
Annunciation Pilot Action Cause
AIRSPEED FAIL Use Standby Airspeed Display system is not receiving airspeed input from the air data computer; accompanied by a red X through the airspeed display.
ALTITUDE FAIL Use Standby Altitude. Display system is not receiving altitude input from the air data computer; accompanied by a red X through the altimeter display.
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本文链接地址：钻石20系列飞机维护手册 DA 20 SERIES AIRPLANE MAINTENANCE MANUAL(92)
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