Piper CHEROKEE CRUISER PA-28-140 Information Manual page 61

CHEROKEE CRUISER
D. PIPER AUTOCONTROL III AND/OR AUTOCONTROL IIIB INSTALLATION
1. LIMITATIONS
a. Autopilot OFF during takeoff and landing.
b. Autopilot use prohibited above 140 MPH CAS.
2. PROCEDURES
a. PREFLIGHT
(1)
Roll Section
(a) Place Radio Coupler in "Heading" mode and place A/P
ONIOFF switch in the "ON" position to engage roll section.
Rotate roll command knob Left and Right and observe
control wheel describes a corresponding Left and Right
turn, then center knob.
(b) Set proper D.G. Heading on D.G. and turn Heading Indice
to aircraft heading. Engage "Heading" mode switch and
rotate Heading Indice right and left. Aircraft control wheel
should turn same direction as Indice. While D.G. indice is
set for a left turn, grasp control wheel and override the
servo to the right. Repeat in opposite direction for right
turn.
(c) If VOR signal available check Omni mode on Radio Coupler
by swinging Omni needle left and right slowly. Observe that
control wheel rotates in direction of needle movement.
(d) Disengage by placing the AlP ON/OFF switch to the "OFF"
position.
b. IN-FLIGHT
(1)
Trim airplane (ball centered).
(2) Check air pressure or vacuum to ascertain that the Directional Gyro
and Attitude Gyro are receiving sufficient air.
(3) Roll Section
(a) To engage, center Roll Command Knob, place the AlP
ON/OFF switch to the "ON" position. To turn rotate roll
command knob in desired direction. (Maximum angle of
bank should not exceed 30°.)
(b) For heading mode, set Directional Gyro with Magnetic
Compass. Push directional gyro HDG knob in, rotate to
aircraft heading. Place the console HDG ON/OFF switch to
the "ON" position. To select a new aircraft heading, push
D.G. heading knob IN and rotate, in desired direction of
turn, to the desired heading
NOTE
In HDG mode the maximum bank angles are limited to
approximately 20° and single command, heading changes should
be limited to 150°. (HDG Indice not more than 150° from
actual aircraft heading.)
FAA APPROVED JUNE 13, 1974
REVISED: NOVEMBER 1, 1974
REPORT: VB-557 PAGE 3-19
MODEL: PA-28-140