Piper PA-28-236 DAKOTA, Pilot Operating Handbook

Page: 293 / 367

PIPER AIRCRAFT CORPORATION SECTION 9
PA-28-236, DAKOTA SUPPLEMENT 8
ISSUED: JULY 23, 1982 REPORT: VB-910
9-43
Figure 7-7 ( cont)
1. KI 525A HORIZONTAL SITUATION INDICATOR (HSI) -
Provides a pictorial presentation of aircraft deviation relative to VOR
radials or localizer beams. It also displays glide slope deviations and
gives heading reference with respect to magnetic north.
2. NAV FLAG - Flag is in view when the NAV receiver signal is
inadequate. When a NAV flag is present in the navigation indicator
(CDI or KI 525A) the autopilot operation is not affected. The pilot
must monitor the navigation indicators for NAV flags to insure that the
Autopilot is tracking valid navigation information.
3. LUBBER LINE- Indicates aircraft magnetic heading on compass card
(10).
4. HEADING WARNING FLAG (HDG) - When flag is in view the
heading display is invalid. If a HDG flag appears and a lateral mode
(HDG, NAV, APR or APR BC) is selected, the Autopilot will be
disengaged. The Autopilot may be re-engaged in the basic wings
level mode. The CWS switch would be used to maneuver the aircraft
laterally.
5. COURSE BEARING POINTER- Indicates selected VOR course or
localizer course on compass card (10). The selected VOR radial or
localizer heading remains set on the compass card when the compass
card (10) rotates.
6. TO/FROM INDICATOR FLAG - Indicates direction of VOR station
relative to selected course.
7. DUAL GLIDE SLOPE POINTERS- Indicate on glide slope scale
(8) aircraft displacement from glide slope beam center. Glide slope
pointers in view indicate a usable glide slope signal is being received.
8. GLIDE SLOPE SCALES- Indicate displacement from glide slope
beam center. A glide slope deviation bar displacement of 2 dots,
represents full scale (0. 7°) deviation above or below glide slope beam
centerline.
9. HEADING SELECTOR KNOB ( ) -Positions heading Bug (14)
on compass card (10) by rotating the heading selector knob. The Bug
rotates with the compass card.
10. COMPASS CARD- Rotates to display heading of airplane with
reference to lubber line (3) on HSI.
11. COURSE SELECTOR KNOB- Positions course bearing pointer (5) on
the compass card (10) by rotating the course selector knob.
12. COURSE DEVIATION BAR (D-BAR) - The center portion of omni
bearing pointer moves laterally to pictorially indicate the relationship
of aircraft to selected course. It indicates in degrees of angular
displacement from VOR radials and localizer beams or displacement in
nautical miles from RNAV courses.