Piper SENECA III - Page 391

PIPER
AIRCRAFT
CORPORATION SECTION 9
PA-34-220T.
SENECA III
SUPPLEMENT 21
(4)
Eor
navigation
operations
select
modes
as
required
by
the
operation
being
conducted
and
in
accordance with
the
mode
description
provided
in Section
7.l.
For
specific
instructions
relating
to
coupled
instrument
approach
operations,
refer
to
Special
Operations
and
Information,
(c)
IN-FLIGHT
PROCEDURE
-
COMMAND
AUTOTRIM
SYSTEM
(I)
When
the
autopilot
is
engaged,
pitch
trim
is
accomplished
and
maintained
automaticaly.
(2)
With
the
autopilot
OFF,command
trim
is
obtained
by
pressing
and
rocking
the
combination
TRIM-AP disconnect
har
on
the
pilot's
control
wheel
trim
switch.
(d)
SPECIAL
OPERAT10NS
AND
lNFORMATION
(I)
Altitude Hold
Operation
For best
results,
reduce
rate
of
climb
or
descent
to
1000
FPM
before
engaging altitude
hold
mode.
(2}
Instrument
Approach
Operations
initial and
or
intermediate
approach
segments
should
be
conducted
between
90-109 KI
AS
with
up
to
2
notches
(25°) flap
selected
if
desired.
Upon
intercepting
the
glide
path
or
when
passing the
final
approach
fix
(FAF)
immediately
lower
the
landing
gear
and
reduce
the
power
for
approximately
9()
KlAS
on
the
final approach
segment.
Adjust
power as
necessary
during
remainder of
approach
to
maintain
correct
airspeed.
Monitor
course
guidance
information
(raw
data)
throughout
the
approach.
All
power
changes
should
be
of small magnitude
and
smoothly
applied
for best
tracking
performance. For
optimum
performance
do
not
change
aircraft configuration
during
final
approach
while
autopilot
is
engaged.
For
approaches
without
glide
path
coupling,
adjust
pitch
attitude
in
conjunction
with
power
to
maintain
desired
airspeed and
descent
rate.
Proper
rudder trim
must
be
maintained
throughout
the
approach
to
insure
maximum
tracking
quality.
NOTE
The
autopilot
will
not
decouple
from
the
GS
or
localizer
in
the
event
of
radio
failure,
however,
warnings
will
flash
in
the
mode appropriate
to
the
failure.
Monitor
course
guidance
raw
data
during
the
approach
to
assure
signal
quality.
ISSUED:
FEBRUARY
10,
1984
REPORT:
VB-1110
7
of 20, 9-141