Piper PA-39 Twin Comanche C/R - Page 40

TWIN COMANCHE C/P
D.
PIPER ALTIMATIC IllB INSTALLATION
I. LIMITATIONS
ROLL and PITCH “OFF” during take-off and landing. ROLL. PITCH, and AUTOFLITE
“OFF” above 225 MPH. MINIMUM COUPLED APPRO.ACH SPEED ( 110 MPH).
3
-. OPERATING INSTRUCTIONS
a.
ROLL SECTION
To Engage:
Push console heading lock button (HDG) “OFF”. Center ROLL knob. Push
ROCKER switch to “ON” position.
To Turn:
Rotate console ROLL knob in desired direction. (Maximum angle of bank should
not exceed 30”. Maximum angle will be 70” with heading lock engaged.)
Heading Lock:
Set directional gyro with magnetic compass. Push directional gyro HDG knob in.
rotate to select desired heading. Push console heading lock button (HDG) to “ON”
position.
Roil Section Ground Check:
With heading lock button “OFF”, engage ROLL SECTION. Rotate ROLL knob
full right and full left. Determine that the control wheel describes a corresponding right
and left turn, then center knob and disengage prior to take-off.
b. PITCH SECTION (ROLL SECTION must be engaged prior to engaging PITCH
SECTION)
:
To Engage:
Push altitude preselect button (ALT) to “OFF” position. Center the PITCH
command disk. Push PITCH button to “ON” position.
To Change Altitude:
Rotate PITCH command disk in desired direction.
Altitude Preselect:
Center PITCH command disk. With airplane in level flight, rotate the altitude
selector DN/UP knob until trim UP/DN indicator is level. Calibrate the altitude
indicator to match altimeter by rotating the knurled altitude indicator dial. Rotate the
altitude selector knob to select desired altitude. Push altitude preselect button (ALT)
to “ON” position.
The altitude preslect button may also be engaged when the aircraft is climbing or
descending. Rotate the altitude selector knob until trim indicator indicates UP or
DOWN as desired, then engage the altitude preselect button.
Pitch Section Ground Check:
With altitude preselect button
“OFF”, rotate the PITCH command disk full
DOWN and ful.l UP. Determine that the control wheel describes a corresponding fore
and aft movement, then center the disk and disengage prior to take-off.
FAA APPROVED November 28,1969 REPORT:1605 PARTIPAGE27
REISSUED: June 1,197O
MODEL: PA-39