Piper PA-39 Twin Comanche C/R - Page 36

TWIN COMANCHE C,,‘R
B.
PIPER AUTOCONTROL III (MODEL AK 16 1) INSTALLATION
1.
LIMITATIONS
Disengage during take-off and landing.
Disengage above 225 MPH CAS.
3
u.
OPERATING INSTRUCTIONS
To Engage:
Push Console Heading Lock button (HDG) to “OFF” position. Center ROLL knob.
Push ON/OFF button to “ON” position.
3.
To Turn:
Rotate console ROLL knob in desired direction.
For Heading Lock:
Set directional gyro (D.G.) with magnetic compass. Push D.G. HDG knob in, rotate to
select desired heading. Push console Heading Lock button (HDG) to “IN” position.
To Disengage:
Push ON/OFF button to “OFF” position.
NORMAL OPERATION
ii.
Be sure airplane is properly trimmed. (Ball Centered)
Check vacuum and ascertain that the directional gyro and artifical horizon are
functioning properly. L
i.
Engage AutoControl.
(Ground Check Only) Rotate the ROLL knob fulI right and full left. Determine that
the control wheel describes a corresponding right and left turn, then center knob.
e.
Set the directional gyro with the magnetic compass. Push D.G. HDG knob in, rotate to
select desired heading.
f.
Push Console Heading Lock button to
“IN” position. The AutoControl is now
“locked-m” for directional control.
iiF*
Turns may be accomplished by either of the following methods:
(1) Push Console Heading Lock button to
“OUT” position. Rotate the ROLL knob
in desired direction.
(2) Push Console Heading Lock button to
“IN” position. Select new heading by
pushing D.G. HDG knob in and rotating.
h.
Maximum angle of bank should not exceed 20’.
i. Disengage AutoControl by pushing the ON/OFF button to “OFF” position.
With Piper Radio Coupler Installed :
The Autopilot is coupled to the VOR NAV receiver in the modes indicated on the
function switch.
In the Heading (HDG) mode, the Autopilot is controlled by the directional gyro.
FAA APPROVED November 28,1969
REISSUED: June 1,197O
REPORT: 1605 PART I PAGE 23
MODEL: PA-39