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5 - PROCEDURES
91
190-00357-00 Rev E
Flying the Missed Approach
After you pass the MAP, if the runway isn’t in
sight you must execute a missed approach. The
500W-series unit continues to give guidance along an
extension of the final course segment (FAF to MAP)
until you manually initiate the missed approach
procedure (as mentioned previously in reference to the
“SUSP” advisory). The OBS key is used to initiate the
missed approach, as follows:
NOTE: It is the pilot’s responsibility for initial
missed approach guidance in accordance with
published procedure. The unit may not provide
correct guidance until established on a defined
leg.
RW04
DO NOT USE FOR
NAVIGATION
1. After commencing the published missed
approach procedure, and after the SUSP
annunciator has appeared, press the OBS key
to sequence to the first waypoint in the missed
approach procedure. This will simultaneously
result in several changes:
a. SUSP annunciation will extinguish.
b. The first waypoint in the missed approach
procedure will be sequenced.
c. The current approach annunciation (LPV,
L/NAV, LNAV+V or LNAV) will be replaced
with either MAPR or TERM, depending
on the design of the approach. Normally,
MAPR will be annunciated for missed
approach procedures in which the first leg
is a climb straight ahead to a waypoint,
whereas TERM will be annunciated for
missed approach procedures requiring a
turn.
d. CDI scaling will change to ±0.3 NM full
scale deflection if MAPR is annunciated,
or ±1.0 NM if TERM is annunciated.
e. The “FROM” indicator will change to a
“TO” indication.
NOTE: In some cases, an additional hold waypoint
is added to the missed approach sequence. This ad-
ditional waypoint is used as an aid in establishing
the holding pattern — especially where the MAP and
MAHP are the same waypoint.
2. An alert message in the lower right hand corner
of the screen recommends entry procedures for
the holding pattern. As you fly the holding pat-
tern, the timer in the lower right corner of the
Default NAV Page automatically resets on the
outbound side of the hold when you are abeam
the hold waypoint. The timer again resets as
you turn inbound (within approximately 30°
of the inbound course). This allows you to use
standard timing (typically one minute) to fly
the inbound and outbound legs of the hold.
NOTE: Time is displayed for standard time-based
holding patterns. Holding patterns that have a
published leg length will display the distance.
Approach with Hold