Flying The Lp Approach - Garmin GTN 625 Pilot's Manual

Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
6.12.2
An LP approach is flown similarly to an LNAV approach, except the precision
Map
is greater as it utilizes the SBAS accuracy. It has similar lateral accuracy as an LPV
approach. Angular scaling is similar to a localizer approach. Most LP approaches
Traffic
have step down altitudes associated with them. The approach still results in an
MDA and missed approach point.
Terrain
If the approach is indicated as LP +V, advisory vertical guidance will be
Weather
provided. This does not change how the approach should be flown, and the
pilot is still responsible for descending to the correct altitude at each step down.
Nearest
The approach still results in an MDA and missed approach point.
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
6-18
7. As you cross the FAF, the destination sequences to the MAP
(e.g. "RW31", the runway threshold). With the needle on the
external CDI (or HSI) centered, fly toward the MAP, observing
the altitude minimums published on the approach plate.
8. When viewing the Map Page, you'll note that the final course
segment is displayed in magenta (the active leg of the flight
plan always appears in magenta).
9. As you approach the MAP, a waypoint message appears on
the bottom of the screen.
10. Once the unit crosses the MAP (defined as the runway end
waypoint), sequencing will be suspended. Prepare the aircraft
for missed approach operation. Touch the Unsuspend key to
sequence to the Missed Approach procedure.
11. Fly the guidance provided by the unit to the MAHP and hold.

Flying the LP Approach

1. Within 30 NM of the destination, the GTN switches from en
route mode to terminal mode and the CDI scale transitions
from 2.0 to 1.0 NM, full scale deflection.
2. As you approach the IAF, a turn direction message appears on
the bottom of the screen.
3. As the distance (DIST) to the IAF approaches zero, the message
is replaced by a time to turn advisory that counts down 10
seconds prior to the turn.
4. As you approach the FAF, the GTN will begin to automatically
rescale in an angular fashion. This will allow the LP approach to
be flown in the same fashion as a standard localizer approach.
At 2.0 NM from the FAF, CDI scaling is tightened from up to
either 2° or 0.3 NM, full scale deflection, whichever is smaller.
Garmin GTN 625/635/650 Pilot's Guide 190-01004-03 Rev. K