Piper SENECA III - Page 103

PIPER
AIRCRAFT
CORPORATION SECTION 4
PA-34-220T.
SENECA
III
NORMAL PROCEDURES
resulting
oil
and
cylinder
temperature
indications
may encourage
the
pdot
to
expedite
his ground
operation
and
commence
a
takeoff
prematurely
This procedure
only
compounds
an
already bad
situation.
Proper
procedures
require
thorough
application
of
preheat
to
all
parts
of
the
engine.
Hot
air should
be
applied
directly
to
the
oil
sump
and
external
oil
lines
as
wellas
the
cylinders, air
intake
and oil
cooler.
Excessively hot
air
can
damage
non-metallic
components
such
as
seals, hoses
and
drive
belts,
so
do
not attempt
to
hasten the
preheat
process.
Betore
starting
is
attempted,
turn
the
engine
by
hand
or
starter
until
il
rotates
freely.
After starting,
observe
carefully
for high
or
low
oil
pressure
and
continue the
warm-up
until
the
engine
operates
smoothlv
and
all controls
can
be
moved
freely.
Do
not
close
the
cowl
flaps
to
facilitate
warm-up
as
hot
spots
may
develop
and
damage
ignition
wiring and
other
components.
(b)
Hot
air should
be
applied
primarily
to
the
oil
sump
and
filter
area.
The
oil
drain plug door
or
panel
may
provide
access
to
these
areas.
Continue
to
apply heat
for
15
to
30
minutes
and
turn
the propeller,
by
hand
through
6
or
8
revolutions
at
5
or
10
minute
intervals,
(c)
Periodically
feel
the
top
of
the
engine
and,
when
some
warmth
is
noted,
apply
heat
directly
to
the
upper
portion
of
the
engine
for
approximately
five
minutes.
This
will
provide
sufficient
heating
of
the
cylinders
and
fuel lines
to
promote
better
vaporization
for
staning,
if
enough
heater
hoses
are
available, continue
heating
the
sump
area.
Otherwise, it
will suffice
to
transfer
the
source
of
heat
from
the
sump
to
the
upper
part
of
the
engine.
(d)
Start
engine
immediately
after completion of
the
preheating
process.
Since
the
engine
will
be
warm, use
normal
starting
procedure.
NOTE
Since
the
oil
in
the
oil
pressure
gauge
line
may
be
congealed.
as
much
as
60seconds
may
elapse
before
oil
pressure
is
indicated.
If
oil
pressure
is
not
indicated
within
one
minute, shut
the
engine
down
and
determine
the
cause.
ISSUED:
JANUARY
8, 1981
REPORT: VB-1110
423