Pilot's Operating Handbook
Section 7
Description
Edition 0 - March 05, 2019
Rev. 2
Page 7.15.13
Under certain circumstances, when the GNSS integrity requirement are not met nor
approach level is available the approach may be aborted.
This is annunciated through an
ABORT APR
and the service level annunciation
being removed from the HSI.
If SBAS becomes unavailable on an RNAV LNAV/VNAV approach,
L/VNAV
is
shown in yellow, the system switches to LNAV/VNAV (Baro-VNAV) service level and
the
APR DWNGRADE
will be generated (the VDI will be flagged NO GP until the
APR DWNGRADE
has been acknowledged).
If the
APR DWNGRADE
is acknowledged, the
L/VNAV
is shown in magenta.
If the
APR DWNGRADE
is not acknowledged, the system will downgrade to LNAV
service level, (
LNAV
shown in magenta), the VDI will remain flagged ‘NO GP’, and
no additional downgrade system message will be generated.
If SBAS becomes unavailable on an RNAV LPV approach,
LPV
will be shown in
yellow, but the CDI and VDI will continue to be shown. At one minute to the FAF, an
APR DWNGRADE
will be generated.
The VDI will be flagged NO GP. Depending on the available lines of minima for the
approach, the system will switch to either LNAV/VNAV or LNAV service level.
Advisory visual approaches
The GIFD will provide advisory visual approaches to many runways in the aviation
database. Lateral guidance for the visual approach is aligned with the runway bearing.
The system also generates vertical guidance from the runway threshold at a 3deg
glide path allowing coupling of the autopilot to the appropriate minimums.
The pilot interface for visual approaches is an extension of the normal approach
selection method. At the end of the list of instrument approaches, there will be a set of
visual approaches added. Nominally, there will be a visual approach listed for each
runway end.
The approaches will be labeled with the name
VISUAL
and the runway number.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
