Piper ARCHER III Pilot Operating Handbook page 225

PA-28-181, ARCHER ill
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Autopilot (Optional} (continued)
AUTOPILOT OPERATION
When the A VION MASTER switch is selected ON, the GFC700 automatically
conducts a self-test, as indicated by a white boxed PFT on the PFD. Successful
completion of this self-test is indicated by extinguishing the PFf with no AP
failure indications and an autopilot "warble" tone (the same tone as autopilot
disconnect). If the GFC700 preflight test is not completed successfully, the
autopilot and electric pitch trim will not function.
Selected autopilot modes are displayed on the AFCS Status Box at the top of the
PFD. Lateral modes are displayed on the left, autopilot status is in the middle,
and vertical modes are on the right. All active modes are shown in green and
armed modes are white.
Pressing the AP key activates the autopilot and Hight director in the default
ROL and PIT modes. Pressing the FD key activates only the flight director in
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default ROL and PIT modes. Pressing any key associated with a valid lateral or
vertical mode activates that mode and the default mode in the opposing axis. For
example, pressing the ALT key activates the flight director in ALT hold mode
with the default latera. 1 (ROL) mode. Re-selection of any valid lateral or vertical
mode toggles between the selected mode and the default mode for that axis.
If the information required to compute a flight director mode becomes invalid or
unavailable, the flight director automatically reverts to the default mode for that
axis. A flashing yellow mode annunciation and annunciator light indicate loss of
sensor (ADC) or navigation data (VOR, LOC, GPS, VNV, SBAS) required to
compute commands. If the loss occurs in the lateral axis, the system defaults to
ROL mode and rolls wings level. If tbe loss occurs in the pitch axis, tbe system
defaults to PIT mode and maintains the current pitch attitude. The flashing
annunciation stops when the affected mode key is pressed, another mode for the
axis is selected, or after 10 seconds,
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ISSUED: December 22, 2017
REVISED: June 17, 2019
DESCRIPTION & OPERATION
no action is taken .
if
SECTION7
REPORT: VB-2749
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