Descent - Piper SENECA III Pilot's Information Manual

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