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5 - PROCEDURES
116
190-00357-00 Rev E
will begin to automatically rescale in an an-
gular fashion. This will allow the LP approach
to be flown in the same fashion as a standard
localizer approach. At 2.0 nautical miles from
the FAF, CDI scaling is tightened from up to
either 2° or 0.3 nautical miles, full scale deflec-
tion, whichever is smaller.
5. Sixty seconds prior to reaching the FAF, the
500W-series unit will check the required
Horizontal Alarm Limit (HAL) to ensure the GPS
position integrity is within limits to complete
the LP non-precision approach. In the event
the HAL limits are exceeded, the approach will
be downgraded, when available, indicated by
“LNAV” on the moving map, otherwise the
approach will be aborted. A message will note
that the approach is downgraded and the NAV
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 HAL limits cannot
meet non-precision limits, the 500W-series unit
will notify the pilot with a message to abort
the approach. The 500W-series unit will revert
to terminal limits of 1.0 NM to support naviga-
tion to the missed approach.
6. As you cross the FAF, the destination sequences
to the MAP. With the needle on the external
CDI (or HSI) centered, fly toward the MAP,
observing the altitude minimums dictated by
the approach plate.
7. When viewing the Map Page, you’ll note that
the final course segment is displayed in ma-
genta (the active leg of the flight plan always
appears in magenta).
8. As you approach the MAP, a waypoint message
(“Arriving at Waypoint”) appears on the bot-
tom of the screen.
9. At the MAP initiate the missed approach, if
necessary. Once the 500W-series unit crosses
the MAP sequencing will be suspended. Pre-
pare the aircraft for missed approach opera-
tion. Press the OBS key to sequence to the
Missed Approach procedure.
NOTE: For missed approaches with heading legs, fly
manually until the first active course leg is reached, as
described in earlier sections.
10. Fly the guidance provided by the 500W-series
unit to the MAHP and hold.
Flying the LP Approach