Piper CHEROKEE ARCHER II Pilot Operating Handbook page 199

SECTION 9
SUPPLEMENTS
(b) RADIO COUPLER -(OPTIONAL)
PIPER AIRCRAFI' CORPORATION
PA-28-181, CHEROKEE ARCHER II
(1) Tune and identify VOR or VOT station. Position Radio Coupler to OMNI Mode. Engage
Autopilot ROLL and HDG switches. Set HDG bug to aircraft heading and rotate O.B.S. to
cause OMNI indicator Needle to swing left and right slowly. Observe that control wheel
rotates in direction of needle movement.
(2) Disengage AP "ON-OFF' switch. Reset Radio Coupler control to HDG ..
IN-FLIGHT
(a) Trim airplane (ball centered).
(b) Check air pressure vacuum to ascertain that the directional gyro and altitude gyro are receiving
sufficient air.
(c) Roll Section.
(I)
To engage, center ROLL knob, push AP "ON-OFF' switch to "ON" position. To turn,
rotate console ROLL knob in desired direction. (Maximum angle of bank should not exceed
30°.)
(2) For heading mode. set directional gyro with magnetic compass. Push directional gyro HDG
knob in, rotate bug to aircraft heading. Push console heading rocker (HDG) switch to "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.
(d) Radio Coupling - VOR'ILS \vith Standard directional gyro. (Optional)
(1) For VOR Intercepts and Tracking:
Select the desired VOR course and set the HDG bug to the same heading. Select OMNI
mode on the coupler and HDG Mode on the autopilot console.
(2) For ILS Front Course Intercepts and Tracking:
Tune the localizer frequency and place the HDG bug on the inbound, front course
heading. Select LOC-NORM mode on the coupler and HDG mode on the autopilot console.
(3) For LOC Back Course Intercepts and Tracking:
Tune the localizer frequency and place the HDG bug on the inbound course heading to
the airport. Select LOC-REV mode with coupler and HDG mode on the autopilot console.
SECTION 5 - PERFORMANCE
No changes to the basic performance provided by Section 5 of this Pilot's Operating Handbook are
necessary for this supplement.
REPORT: VB-760
9-10
ISSUED: AUGUST 15, 1975