Piper SENECA III - Directional Gyro

PIPER AIRCRAFT CORPORATION
SECTION
9
PA-34-220T, SENECA IN
SUPPI
EMENT
21
1
32
4
PUSH
6
5
DIRECTIONAL
GYRO
Figure
7-9
f.
Non-Slaved Directional
Gyro Provides
a
stable visual
indication
of aircraft
heading
to
the
pilot.
The
gyro
is
air
driven.
2. Lubber
Line
-
Indicates
aircraft
magnetic
heading
on
compass
card
(4).
3.
Heading
Bug
-
Moved
by
(
)
knob
(5)
to
select
desired
heading.
4.
Compass
Card
-
Rotates
to
display
heading
of
airplane
with
reference
to
lubber
line
(2}
on
DG.
5. Heading Selector Knob
(
)
-
Positions
heading
bug
(3)
on
compass
card
(4).by
rotating
the
heading
selector
knob.
The
bug
rotates
with
the
compass
card.
6. Gyro
Adjustinent
Knob
(
PCSH)
-
When
pushed
in,
allows
the
pilot
to
manually
rotate
the
gyro
compass
card
(4)
to
correspond
with the
magnetic
heading indicated
by
the magnetic
compass.
The
unslaved
compass
card
must
be
manually
reset
periodically
to
compensate
for precessional
errors
in
the
gyro.
ISSUED: FEBRUARY 10,
1984
REPORT:
VB-1110
19
of
20,
9-153