sonaca aircraft S201, Руководство по эксплуатации воздушного судна

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S201 AFM
3 - EMERGENCY PROCEDURES
3.10 - OTHER EMERGENCIES
27/06/2019
SONAIR-S2-D-MAN-006 Page : 3-41
Rev. : A
3.10.9 GPS / COM / NAV MALFUNCTIONS
•
Data source – pressure altitude source inoperative or connection to GTN
lost message
Since the GTN is being used to forward pressure altitude to the transponder, it
will not be receiving pressure altitude from the GTN while that message is
present.
•
In-air restart of GTN
In the event of a GTN restart in the air, the crew should utilize the CANCEL button
if presented with the database update screen after the GTN is restarted. This will
ensure restoration of the navigation functions as soon as possible.
•
Baro-alt input failure
Barometric altitude is required for descent VNAV functionality and automatic
sequencing of altitude terminated legs. If the BARO altitude input to the GTN has
failed, enroute barometric VNAV will not be available. The pilot will also be
required to manually sequence any altitude terminated legs.
•
Temperature input failure
Temperature input is required for the VNAV Transition to Approach
functionality. In the event of a temperature input failure, VNAV transition to
approach should be disregarded. The crew must ensure that vertical guidance
from descent VNAV to approach guidance is appropriate.
NOTE
In case of failure of the NAV1/GPS power circuit, the COM1
functionality will be inoperative.