Piper PA-39 Twin Comanche C/R - Page 41

TWIN COMANCHE C/R
C. AUTOFLITE SECTION
The AUTOFLITE SECTION of the AltiMatic IIIB is approved for all attitudes.
including take-off and landing. The engagement of the ROLL SECTION of the
AltiMatic automatically disengages the AUTOFLITE SECTION.
To Engage:
Place AUTOFLITE rocker switch in “ON” position. Correct minor heading
variation by rotating AUTOFLITE “TRIM” knob in desired direction.
To Turn:
Push AUTOPILOT “OFF” button on control wheel. Make turn manually. Release
button to re-engage AUTOFLITE on completion of turn.
d. PITCH TRIM SECTION
The airplane can be trimmed (1) manually with the crank or (2) by actuating the
pitch trim slide switch on the pilot’s control wheel. Push switch forward for nose down
trim and rearward for nose up trim. Pitch trim is automatically accomplished when the
PITCH SECTION is engaged.
With Pitch Trim Warning Light InstaIled:
The warning light on the instrument panel will light when the pitch is out of trim
for approximately 4 seconds, when the pitch section is engaged.
The press-to-test feature of the indicator light assembly, when held in (with
autopilot pitch function engaged) will show the operator that the lamp is good and the
length of time that is required for the warning system to actuate.
With Piper Radio Coupler Installed:
The ALTIMATIC is coupled to the VOR NAV receiver in the modes indicated on
the function switch.
In the heading (HDG) mode, the ALTIMATIC is controlled by the directional
gyro.
3. NORMAL FLIGHT OPERATION
L.
Be sure airplane is properly trimmed. (Ball Centered)
Engage AUTOFLITE SECTION.
. Check vacuum and ascertain that the directional gyro and artificial horizon are
functioning properly.
d. Engage ROLL SECTION.
F:
Engage PITCH SECTION.
Disengage ROLL and PITCH SECTIONS before landing.
4. WITH GLIDE SLOPE COUPLER INSTALLED (FLIGHT)
a.
Set Radio Coupler to localizer normal mode (LOC/NORM).
b.
“Engage” altitude hold.
i.
Extend landing gear and set flaps 15 ’ maximum.
Adjust power to maintain desired approach speed 110 to 120 MPH.
5. EMERGENCY PROCEDURES
a.
In the event of a malfunction in the ROLL or PITCH SECTION, push the ROLL
ON/OFF button “OFF”, or push the A/P “OFF” button on the control wheel.
REPORT: 1605 PART I PAGE 28
MODEL: PA-39
FAA APPROVED November 28,1969
REISSUED: June 1.1970
REVISED: March 17,1971