Piper SENECA III User Manual

SECTION
3
PIPER
AIRCRAFT
CORPORATION
EMERGENCY
PROCEDURES
PA-34-220T.
SENECA III
SN
34-N333001
AND
UP
if
an
ALT
annunciator
hght
illuminates
check the
output
of
each
alternator
indisiduallv,
using
the
prss
to-test
buttons
located
on
either
side
of
the
ammeter to
determine
which
..uternator
is
inoperalive. If
both
alternators
show
zero
output.
reduccelectricalloads
to
the
minimum.
Turn
OFF
both
alternator
switches
and
then
turn
them rnomentarily
ON
one
at
a
time
while
obscr
ing
alternator
output.
The
alternator showing
the
LEAST
(but
not
zero)
current
should
be
turned
ON.
The
other
alternator should
be
left OFF.
Electrical
loads
may
be
reinstated
as
required
toa
maximumof60
amperes.
If
both
alternator
outputs
cannot
be
restored, both
alternator
switches
should
be
left
OFE,
Reduce
the
electrical
load
to
essential
systems
and
land
as
soon
as
practical.
The
battery
is
the only remaining
source
of
electrical
power.
If
one
alternator
shows
zero-output,
cycle
its
switch
OFF
and
then
ON.
If
this fails
to restore
output
check the
circui.t
breakers.
The
breakers
may
be
reset
once
if
required.
If
the alternator
remains
inoperative
reduce
electrical
loads
if
necessary
and
exercise
judgment
regarding
continued
flight.
When
the
ammeter
needle
indicates
to
the left
of
center.
the
battery
is
being
discharged;
when the
needle
indicates
to
the
right
of
center,
the
battery
is
being
charged.
During
single
alternator
operation
the
feature
can
be used
to
determine how
much the
electrical
load
should
be
reduced.
Correctne
maintenance actions
should
be
períormed prior
to
further
flights
NOTE
The
markings
an
the
ammeter
(loadmeter)
require
mental
interpolations
to
estimate the
ampere
values
noted.
Operating
thealternators
at
less
than
60
amperes
will
assure
that
the
battery
will
not
be depleted.
WARNING
Compass
error may
exceed
10°
with
both
alternators
inoperative.
REPORT:
VB-ll10
ISSUED:
JANUARY 8. 1981
3-22
REVISED: AUGUST 9, 1982

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