Piper SENECA III User Manual

PIPER AIRCRAFT
CORPORATION
SECTION 9
PA-34-220T, SENECA IH SUPPLEMENT 21
a.
Interlocks
I.
Autopilot
engagement
is
inhibited
unlessanexcitation
signal
is being provided
to
the
attitude
gyro.
2. Selection
of
ALT
mode
is inhibited
if
the
system
altitude
information is
unreliable
or
ifthe
entire
system
has
not
been
powered for
approximately
3
minutes
to
allow
stabilization of
the
altitude
source.
3.
During Dual Mode
(selected
angle)
intercepts,
if
the
navigation
information
becomes
invalid
the appropriate
NAV
APR
REVannunciatorwilllashandautomatic
mode
switching
from HDG
to
the coupled navigation
mode
will
be
inhibited.
b.
Warnings
1.
1
ow
Voltage
-
When
the aircraft
bus
voltage
falls
below
the
minimum required
for
reliable
system
function,
any
mode
annunciator
not
already
ON
will
flash.
2.
Attitude
Gyro
Excitation
-
Absence of
valid
gyro
excitation will
cause
the
autopilot
to
disengage
and
the
AP
annunciator
to
flash. The
autopilot
cannot
be
re-
engaged
until this
condition
is
corrected.
3. AP Disengagement
-
Anytime
the
autopilot
is disen-
gaged the
AP
annunciator
will
flash
for
approximately
5
seconds,
then
remain
OFF.
4.
Navigation
Information
Invalid
-
The
appropriate
navigation
mode
annunciator
will
flash
when
selected
and
invalid
navigation signals
are
present
(NAV
Flag
in
view).
Additionally.
the
appropriate navigation
modeannunciator(NAV APR
REV)willflashduring
a
dual
mode
intercept if invalid
navigation
information
is
present,
5. GS
Informatíon Invalid
-
The GS
annunciator will
flash
when
GS
information
(
GS
Flag
in
view)
is invalid
after
the
GS
mode is active
or
when
HDG,
NAV
or
REV mode
is
selected
after GS
capture,
if
valid
GS
information
is
not
available
during
the arming
sequence,
the
system
will
not
arm
and
GS
capture
will
not
occur.
ISSUED:
FEBRUARY
10,
1984
REPORT:
VB-1110
15
of 20,
9-149
I

Piper SENECA III Specifications

General

Manufacturer	Piper Aircraft
Model	Seneca III
Engine Type	Piston
Engine Model	Continental TSIO-360-KB
Seating Capacity	6
Cruise Speed	188 knots (216 mph, 348 km/h)
Length	28 ft 7 in (8.71 m)
Max Takeoff Weight	4, 750 lb (2, 155 kg)
Horsepower	220 hp each
Service Ceiling	25, 000 ft (7, 620 m)
Height	9 ft 11 in (3.02 m)
Propellers	2-bladed constant speed