S-TEC System 55X, Operating Handbook

Page: 41 / 56

4-32 2nd Ed: May 31, 2002
SYS FIFTY FIVE X POH
During the intercept sequence, the system operates in maximum gain
and sensitivity to needle positon and motion and can command the
aircraft at 90% of the standard rate turn. When the localizer course
i s intercepted and the needle is centered (indicating course capture),
initiation of the tracking gain program is automatic.
If the aircraft is equipped with the
optional remote annunciator, the
NAV, APR, and CAP modes will be
displayed.
The high sensitivity level is maintained for about 15 seconds while the
wind correction angle is established. Turn rate maximum is then
reduced to 45% of standard rate.
The optional remote annunciator
will indicate NAV, APR, CAP, and
SOFT.
If the course selector is within 5
!
of center and needle deflection is less
than 10%, the computer will immediately establish this sensitivity level
when NAV is selected.
Set the heading bug to the outbound procedure turn heading and select
Heading Mode (HDG). At the appropriate time, in 90
! increments, set
the heading bug to the inbound procedure turn heading. Once
established on the inbound procedure turn heading, follow the localizer
back-course intercept and tracking procedures for optional HSI (as
noted in para. 4.3.9.1).