5 - PROCEDURES
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190-00357-00 Rev C
• IftheCDIoutputhasnotautomaticallyswitched
from GPS to ILS upon reaching the FAF, you must
manuallyswitchtotheVLOCreceiverbypressing
the CDIkey.Verifythat“VLOC”isdisplayeddirectly
above to the CDI key.
• AutomaticswitchingofCDIoutputisavailable
forILS,localizer,SDFandLDAapproaches.Auto-
maticCDIswitchingisnot available for backcourse
approachesorVORapproaches.
• Whenyinganapproachwiththeautopilot-coupled,
you must monitor system functions at all times and
verify that the autopilotandexternalCDI(orHSI)
switchtotheVLOCreceiverwithsufcienttimeto
capture and track the approach course. Switching
to“VLOC”lateintheapproachmaynotprovidethe
autopilot enough time to respond and intercept the
approach course prior to the FAF (depending upon
the performance characteristics of your autopilot and
aircraft). In such instances, you should manually fly
the approach or refer to the documentation provided
with your autopilot.
• WhenanILSorVORapproachisrstselectedor
executed, the frequency is automatically checked.
If the frequency is correct, you will not receive a
message regarding the frequency. If the frequency
is incorrect, you will receive a message and you
mustplacetheILSorVLOCfrequencyintheactive
frequency field.
When an ILS approach is first selected, the
ILS frequency is automatically placed in
the standby VLOC frequency field. Press the
VLOC flip-flop key to use this frequency.
• When flying a localizer-based approach
(otherthanbackcourse)withautomaticCDI
switching enabled:
1. “GPS” guidance may be used while flying
outbound and on the initial portion of the
procedure turn.
2. “VLOC” guidance is used on the remainder of
the approach from the time you turn inbound
on the procedure turn.
3. The localizer frequency must be active to use
“VLOC” guidance at the MAP. Press the CDI
key to switch back to GPS data when the
missed approach is initiated.
• Whenyingalocalizer-basedapproachwithauto-
maticCDIswitchingdisabled:
Enabling Autopilot Outputs
