SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
6-3
Automatic Flight Control System (AFCS)
D BC (Back Course) Button -- The BC button selects approach mode
guidance to capture and track a back course ILS. There is no
glideslope capture during the BC mode.
D APP (Approach) Button -- The APP button arms the lateral
guidance for localizer capture and vertical guidance for glideslope
capture. Glideslope capture is inhibited until the localizer is
captured.
D NAV (Navigation) Button -- The NAV button arms the lateral
guidance to capture the selected navigation course or desired track
that is displayed on the active EHSI.
NOTE: For serial No. 5087 and later, LASERTRAK
r
can be
selected for display on the EHSI. When this is done, NAV
and VNAV cannot be selected.
D BANK Button -- When the BANK button is pushed, the bank angle
limit in VOR, HDG select, or LNV (lateral navigation) modes is
manually selected. Toggling the BANK button alternately selects a
24 high bank limit (27 HDG select, or 30 LNV) or a 17 low bank
limit. At power--up, high bank is selected. The bank limit selected
remains the same (high or low) during transitions between VOR,
HDG, and LNV modes unless it is manually reselected.
When the aircraft climbs through 32,400 feet, the
system automatically selects the low bank angle limit, if it is not
already selected. The high bank angle limit can be reselected by
pushing the BANK button.
When the aircraft descends through 31,900 feet, the system
automatically selects the high bank angle limit, if it is not already
selected. The low bank angle limit can be reselected by pushing the
BANK button.
NOTE: For serial No. 5087 and later, low bank selection is
available only when HDG select or VOR is selected.
D CAT 2 (Category II) Button -- Pushing the CAT 2 button enables the
Category II approach functions (monitors and annunciators). CAT
2 can only be selected if the approach mode is armed and radio
altitude is less than 1200 feet.
D STBY (Standby) Button -- The STBY button cancels all selected
flight director modes.
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