A waypoint change to 00 will cause the computer to
enter the pattern steering mode. The coordinates for
waypoints 1, 2, 3, and 4 will be saved and replaced with
computed waypoints for the pattern. Waypoints 0 and 4
will be the initial point (IP) for the pattern. The differences
between the pattern steering mode and the normal
steering mode are:
Automatic leg switching will occur when directly over
the destination waypoint.
automatically. If MAN leg changing was specified on the
INS SETUP page, the aircraft will continue on the same
path with a flashing WAYPOINT ALERT lamp until leg
changing is changed to AUTO on the MFD.
The approach to the base or return legs will be at 90
degrees versus the normal approach of 45 degrees.
The program is designed to overfly all waypoints with
a minimum of overshoot, provided sufficient distance to
the return leg has been entered. When coupled to the
autopilot, up to three maximum bank turns may be
commanded while performing the 180 degree return.
The pattern steering mode is exited when the
operator inserts a valid non 00 leg switch command. The
original set of four waypoint coordinates will be returned
to their former location.
Normal Operating Procedures.
BATTERY switch ON.
switches Set as follows:
Aircraft #1 and #2 INVERTER
AUTO PLT POWER switch ON.
switch EXT PWR.
#1 and #2 three phase inverter
BUS CROSS TIE switch AUTO.
ATT pushbutton selector switch
(display controller) Depress as
Autopilot EFIS 1/2 switch EFIS 1.
INS - Align as follows:
Mode switch B (MFD) Depress to
select FPLN page.
NAV SETUP (R5) Depress.
INS SETUP (R5) Depress.
INS mode selector STBY. (Text
at L1 will be blank until INS mode
Then, last align and last known
text will appear.)
POSITION NOT ENTERED will appear.
INS malfunction codes are shown in table 3-9. INS
action codes and recommended actions are shown in
Present position Enter by one of
the following methods:
( 1) To accept LAST ALIGN
coordinates, SKPD 1, then
( 2) To accept LAST KNOWN
coordinates, SKPD 2, then
( 3) SKPD
coordinates, then depress
When L1 is depressed INS LOADING
will appear at the top of the MFD and
X.DD.MM.SS.Y.DD.MM.SS and ALIGN
STATE 9. It takes 6 to 8 minutes for
the program to load.
Valid alignment data for LAT/LONG is X.DD.MM.SS.T
X = Latitude hemisphere (N or S)
DD = Degrees of latitude (0 90)
MM = Minutes of latitude or longitude
SS = Seconds (0 59)
T = Tenths of seconds (0 9)
Y = Longitude hemisphere (E or W)