User manual

Piper PA-31T Cheyenne X
Aerosoft GmbH 2007
64 65
64 65
The NAV mode is cancelled by depressing the NAV button, or selecting
HDG (when in NAV coupled) or APPR modes, or pushing FD to „OFF“.
Caution: The NAV mode of operation will continue to provide airplane
control without a valid VOR/LOC signal (NAV flag in view).
Special note: When an ILS frequency in range is tuned into the NAV1
radio, a possible selected VOR GPS mode is cancelled, and the autopilot
reverts to NAV mode (i.e. the autopilot follows the localizer signal
only!).
APPROACH (APPR ARM, APPR CPLD and GS CPLD) Mode
The APPR mode provides visual roll and pitch commands on the FCI
V-bar to capture and track precision ILS (LOC and Glideslope) beams,
or non-precision VOR radials. Lateral and vertical deviation can be
monitored on the HSI.
Operation of the APPR mode requires the pilot to
Set the NAV receiver frequency.
Set the HSI course pointer to the inbound runway heading or
the front course in case of ILS precision approach. Do this even
on back course approach.
Set the HDG SEL”bug” on the HSI to the desired intercept
angle and activate HDG” mode.
Depress the „APPR” button on the mode controller.
The automatic APPR capture function will be immediately armed
„APPR ARM” will be lighted on the Mode Annunciator Panel.
In APPR ARM mode, prior to capture, the heading select mode is reta-
ined in order to allow the pilot to adjust heading to Approach Control
vectoring instructions. The LOC beam or VOR „capture” point will
vary, depending on angle of intercept and rate of change of deviation
indication. Upon capture, a bank command will be introduced on the
FCI, the existing heading mode will be cancelled and „APPR/CPLD”
will be lighted on the Annunciator Panel.
The pilot may manually bank the aircraft to satisfy the command
display, which will command a rollout to level flight when the aircraft
is on course. Automatic crosswind compensation will provide precise
1.
2.
3.
4.