S-TEC System 55X, Руководство по эксплуатации

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2nd Ed: May 31, 2002 4-19
SYS FIFTY FIVE X POH
4.3 Approach Procedures
4.3.1 Procedure Turn Localizer Approach (Standard DG)
Select the appropriate localizer frequency. Set the heading bug to the
OUTBOUND localizer course and engage the REV Mode to track the localizer
front course outbound or back course inbound.
When a localizer is channeled and REV Mode is selected, the System
Fifty Five X will automatically execute high sensitivity gain for the approach
and APR and REV will be annunciated.
If the course needle is at full-scale deviaton, the autopilot will establish a
45
!
intercept angle. As the aircraft approaches the localizer course, the
autopilot senses the closure rate and gradually shallows the intercept
angle. The point that this turn begins is variable depending on the aircraft
position and closure rate to the course. However, the turn will always
begin between 100% (full-scale) needle deflection and 20% of full-scale.
During the intercept sequence, the system operates in maximum gain and
sensitivity to needle position and motion and can command the aircraft
at 90% of the standard rate turn. When the localizer course is 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
APR, REV, and CAP Modes will be
annunciated.
The high sensitivity level is maintained for about 15 seconds while wind
correction angle is established. Turn rate maximum is then reduced to
45% of standard rate.
The optional remote annunciator
will indicate APR, REV, CAP, and
SOFT.