Piper SENECA III - Descent

PIPER
AIRCRAFT
CORPORATION
SECTION 4
PA-34-220T,
SENECA
III
NORMAL
PROCEDURES
Should
the
current
requirement
exceed 130
amps,
the
alternators
will
continue
at
65
amps
each, the
remainder
coming
from
the battery.
There-
fore.
to
insure
against
battery
discharge,
it
is
recommended that
electrical
loads be
adjusted
to
limit
continuous
alternator
outputs
to
55
amps.
lt
is
not
recommended
to
take
off
into IFR
operation
with only
one
alternator
operative
even
though
electrical
loads
may
be
less
than
55
amps.
Since
the
Seneca
Ill
has
one
combined fuel
tank
per
engine,
it
is
advis-
able
to
feed
the
engines
symmetrically
during
cruise
so
that
approximately
the
same
amount
of
fuel
will
be
left in each
side
for
the
landing.
A
crossfeed
is
provided
and
can
be
used
in
cruise
after
30
minutes
of
flight
to
balance
the
fuel
quantity
and
extend
the
range
during
single-engine
operation.
Monitor
the
fuel
quantity
for
the
tank
not
being
used
to
avoid
overflow
due
to
vapor
return.
During
flight, keep account
of
time and
fuel
used
in
connection
with
power
settings
to
determine how
the
fuel
flow
and
fuel
quantity
gauging
systems
are
operating.
If
the
fuel
flow
indication
is
considerably
higher than
the
fuel
actually
being
consumed
or
if
an
asymmetric
flow
gauge
indication
is
observed.
a
fuel
nozzle
may
be
clogged
and
require
cleaning
There
are
no
mechanical
uplocks
in
the
landing
gear
system.
In
the
event
of
a
hydraulic
system
malfunction,
the
landing
gear
will
free-fall
to
the
gear
down
position. The
true
airspeed
with
gear
down
is
approximately
75%
of
the
gear
retracted
airspeed
for
any
given
power
setting.
Allowances
for
the
reduction
in
airspeed
and
range
should be made
when
planning
extended
flight between
remote
airfields
or
flight
over
water.
For
flight
above
12,500 feet
see
FA
R
9 L
32
requirements
for
oxygen
and
Section
9
-
Supplements
in
this
handbook.
4.39
DESCENT
When
power
is
reduced
for descent,
the
mixtures
should be
enriched
as
altitude
decreases
The
propellers
may
be
left
at
cruise
setting; however
if
the
propeller
speed
is
reduced,
it
should
be
done
after
the
throttles
have been
retarded.
Cowl
flaps
should
normally
be
closed
and the
E.G.T.
should
be
maintained
at
approximately
1300°F
or
higher
to
keep
the
engines
at
the
proper
operating
temperature.
ISSTED:
JANUARY
8, 1981
REPORT:
VB-1110
4-31