User manual

Page 58
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
The pilot may manually bank the aircraft to satisfy the command display, which
will command a rollout to level ight when the aircraft is on course. Automa-
tic crosswind compensation will provide precise tracking. VOR/LOC deviation is
shown on the HSI, and actual crab angle will be shown by offset of the course
arrow from the lubber line.
Throughout APPR mode operation, LOC and Glideslope deviation or VOR devia-
tion are displayed in the HSI. If the Autopilot is engaged during operation in the
APPR mode, automatic steering response will follow the command display on the
FCI.
The Glideslope mode is armed for automatic capture if LOC front course capture
has occurred. Automatic Glideslope capture occurs as the aircraft passes through
the glide path from above or below.
Upon interception of the Glideslope, capture occurs and „GS CPLD” is lighted
on the Annunciator Panel. A smooth capture pitch command is displayed by the
Command V-bar. The pilot (or Autopilot) controls the aircraft to satisfy the Com-
mand V-bar.
Upon GS capture, the ALT HOLD mode (if active) is cancelled. However, ALT HOLD
may be manually reselected to maintain altitude upon reaching MDA if visual
contact is not established.
During VOR or RNAV approaches, Glideslope capture will not occur because the
NAV receiver is channeled to a VOR station, not an ILS, and this locks out the Gli-
deslope function.
APPR CPLD mode is cancelled by selection of HDG, NAV, or Go-Around modes, or
pushing FD or APPR to „Off”.
CAUTION: The APPR mode of operation will continue to provide airplane control
without a valid VOR/LOC signal (NAV ag in view).
NOTE: Overshoot protection is not possible in Microsoft Flight Simulator)
BACK COURSE (BACK CRS) Mode
Whenever a LOC or ILS frequency is selected, the BC mode may be activated by
depressing the BC button on the Mode Controller, after selecting APPR. When in
BC mode and Localizer capture occurs. the system will turn and track outbound
on the front course or inbound on the back course. The BC mode reverses the LOC
deviation signal and course datum to permit the FCI steering command display
to operate on a y-to rather than a y-from basis on the reverse course. „BACK
CRS” is lighted on the Annunciator Panel.