Section 3 In-Flight Procedures
2nd Ed Aug 2019
S-TEC 3100 Digital and Analog
3-10
1)
APR
– VOR approach
2)
APR
LOC
– LOC/ILS approach. Glideslope (GS) mode automatically
arms as the vertical mode.
3)
APR
GPSS
– Tracks inbound course using internally calculated GPS
steering commands.
4)
APR
GPSL
– Follows lateral deviations from WAAS capable GPS for LPV,
LNAV/VNAV, and LNAV+V approaches. APR
GPSV
also automatically
arms as the vertical mode.
NOTE:
When interfaced to a DG there is no course pointer input to the 3100.
Set the DG selected heading to the required course value.
NOTE:
The airspeed must be kept within the envelope speeds stated within
the AFMS during coupled approaches. Active envelope protection
may deviate the aircraft from the glideslope path to remain within the
airspeed envelope range in order to maintain safety of flight and reduce
the risk of stall.
NOTE:
It is recommended to capture the glideslope at 1500 feet AGL to avoid
active envelope protection operation below 500 feet AGL.
NOTE:
Back course (REV) approaches are only available when interfaced to an
EFIS and automatically detected by the 3100. Non-EFIS interfaces do
not have back course (REV) capability.
3.7.4.1. VOR Approach (APR)
A VOR may be tracked in APR mode and should only be engaged when
cleared for the approach. APR mode provides greater control and authority
than tracking in NAV mode.
