5 - PROCEDURES
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190-00357-00 Rev C
Flying the LPV Approach
1. Within 31 nautical miles of KSLE, the GNS
500W Series unit switches from en route mode
to terminal mode and the CDI scale transitions
from 2.0 to 1.0 nautical miles, full scale deflec-
tion.
2. As you approach the IAF (GLORR), a waypoint
message (“Left to 314° in x sec”) appears on
the bottom of the screen.
3. As the distance (DIS) to the IAF approaches
zero, the message is replaced by a turn advi-
sory that counts down 10 seconds prior to the
turn.
4. As you approach the FAF (LOTKE), the GNS
500W-series unit will gradually transition to an
angular CDI scale. This allows the approach to
be flown in an identical fashion to a standard
Localizer or ILS approach. At 2.0 NM from
the FAF, CDI scaling is tightened from 1.0 to
the angular full scale deflection (typically the
angular full-scale deflection is 2.0°, but will be
as defined for the approach).
As you approach the FAF (LOTKE), a waypoint
alert (“Next DTK 313
°
in x sec”) appears in the
lower right corner of the display reminding
you to begin the turn.
5. Sixty seconds prior to reaching the FAF (LOTKE),
the unit will check the required Horizontal Alarm
Limit (HAL) and Vertical Alarm Limit (VAL) to
ensure the GPS position integrity is within limits
to complete the LPV precision approach. In the
event the HAL or VAL limits are exceeded, the
approach will be downgraded to a non-preci-
sion approach indicated by “LNAV” on the
moving map, a message that the approach is
downgraded (“Approach downgraded - Use
LNAV minima”), and the glideslope indicator
will be flagged. You may continue the approach
using LNAV non-precision minimums if there
are LNAV minimums for this approach. In the
rare event the GPS integrity cannot meet the
non-precision HAL limits, the unit will send a
message to the pilot to abort the approach
(“Abort Approach - Loss of Navigation”). The
unit will revert to terminal limits to support
navigation to the missed approach when the
message is acknowledged.
6. Capture the glideslope as you would an ILS
glideslope.
7. As you cross LOTKE, the destination sequences
to CUKEV and then the MAP (“RW31”, the
runway threshold). With the needle on the
external CDI (or HSI) centered, fly toward the
MAP, observing the altitude minimums dictated
by the approach plate.
LPV Approach
