T B M
850
SUPPLEMENT 69
BARO--VNAV APPROACHES
Edition 1 -- September 30, 2018
Rev. 0
Page 9.69.18
APPROACH LEVEL DOWNGRADE
Some automatic approach service downgrade may be performed
automatically upon loss of SBAS or GPS approach alarm limits being
exceeded, depending on the approach service level that has been loaded in
the flight plan and activated.
This automatic downgrade is annunciated to the pilot through an ”APR
DWNGRADE” amber CAS message and a change in the annunciated
service level in the HSI.
As the ”APR DWNGRADE” amber CAS message may not be triggered
under certain circumstances, the HSI annunciation shall be considered as
the primary mean to annunciate any approach downgrade.
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” red CAS message 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” amber CAS
message will be generated (the VDI will be flagged NO GP until the ”APR
DWNGRADE” amber CAS message has been acknowledged).
If the ”APR DWNGRADE” amber CAS message is acknowledged, ”L/VNAV”
is shown in magenta.
If the ”APR DWNGRADE” amber CAS message 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” amber CAS message 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.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
Summary of Contents for TBM 850
Page 1: ...PILOT S INFORMATION MANUAL TBM 850 Edition 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 142: ...3 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
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Page 150: ...3 3 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
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