Piper SENECA III User Manual

SECTION 7
PIPER
AIRCRAFT
CORPORATION
DESCRIPTION &
OPERATION
PA-34-220T,
SENECA IH
On
airplanes
equipped with
an
optional
primer
system
(identified by
Placard
below
starter
switch
shown
in
Figure
7-15).
the primer
switch
location
and
actuation
is
the
same
as
the
basic
airplane
However,
this
system
does
provide
a
separate
primer
system
as
an
integral
part
of
the
engine
fuel
system.
An
electrically
operated
diverter
valve
is
located
in the
metered
fuel
supply
line
between
the
air
throttle valve
and
the
manifold
valve
Other
components
are
two
primer
nO77]es,
located
in
the
intake
mani-
fold
on
each
side
of the engine, and
the
interconnecting fuel lines.
Actuation
of the
engine
primer
switch
operates
the
auxiliary electric
fuel
pump
on
Hl
and
energi7es
the
diverter
valve
which
supplies
fuel
to
each
primer
nO/7ÌC.
The
diverter
valve
does
not
shut
off
fuel flow
to
the
manifold
valve.
there-
fore
some
quantity of
fuel is
also
supplied
to
each
cylinder nozzle
during
priming. Normal
operation of the
auxiliary
fuel
pump
is
unchanged.
Fuel
management
controls
are
located
on
the
console between
the
front
seats.
There
is
a
control
lever
for
each
of the engines, and
each
is placarded
ON
-
OFF
-
X
FEED.
During
normal
operation. the
levers
are
in
the ON
position,
and
each
engine
draws
fuel from
the
tanks
on
the
same
side
as
the
engine.
The
two
fuel
systems
are
interconnected
by
crossfeed
lines.
When
the
X
FEED
position is
selected, the engine
will
draw
fuel
from
the tanks
on
the
opposite
side
in
order
to
extend
range
andkeep
fuel
weight
balanced
during
single-engine
operation.
The OFF
position
shuts
off
the
fuel flow from
a
side.
NOTE
When
one
engine
is
inoperative
and
the
fuel
selector
for the operating
engine
is
on
X
FEED
the selector
for
the
inoperative
engine
must
be
in
the
OFF
position.
Do
not
operate
with
both
selectors
on
X
FEED, Do
not
take
off
with
a
selector
on
X
FEED. Fuel
and
vapor
are
always
returned
to
the tank
on
the
same
side
as
the
operatmg
engme.
REPORT:
VB-ll10
ISSUED: JANUARY
8,
1981
7-16
REVISED:
SEPTEMBER 23,
1983

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