User manual
Page 57
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
If the Autopilot is engaged, the aircraft will bank to satisfy the command display
and rollout on course automatically.
Upon station (or waypoint) passage, an outbound course other than the inbound
reciprocal can be selected by resetting the NAV course arrow on the HSI. This
will cause an immediate V-bar deection on the FCI directing a turn to the new
course.
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 ag 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 auto-
pilot 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 cap-
ture 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
1. Set the NAV receiver frequency
2. 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
3. Set the HDG SEL”bug” on the HSI to the desired intercept angle and activate
HDG” mode
4. 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 retained 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 inter-
cept 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.