Piper SENECA III - Page 301

PIPER
AIRCRAFT
CORPORATION
SECTION 9
PA-34-220T,
SENECA
HI
SUPPLEMENT 6
WARNINGS
Do
not
cycle
pneumatic
boots
with
less
than
I /4
inch
of
ice
accumulation;
operation
of
boots
with
less
than I
/4
inch
ice
accumulation
can
result
in
failure
to
remove
ice.
Do
not
hold
momentary
surface
deice
switch
ON.
Heat
for
the
lift
detectors
is activated by
the
pitot
heat
switch.
When
ice
has
accumulated
on
the
unprotected
surfaces of the airplane,
aerodynamic
buffet
commences
between
5
and
10
knots
above
the
stall speed. A sub-
stantial
margin
of airspeed
should be
maintained
above
the
normal
stall
speed,
since
the
stall speed
may
increase
by
up
to
10 knots
in
prolonged
temg
encounters.
lf ice is
remaining
on
the
unprotected
surfaces
of the
airplane
at
the
termination
of
the
flight,
the
landing should be
made
using full flaps
and
carrying
a
slight
amount
of
power
whenever
practical,
and approach speeds
should be
increased by
10
to
15 knots.
Cruise
speed
may
be
significantly
reduced
in
prolonged
icing
encoun-
ters.
If
icing
conditions
are
encountered
at
altitudes
above
10,000 feet,
it
may
be
necessary
to
descend in
order
to
maintain
airspeed
above
the best
rate
of
climb speed
(92
KIAS).
NOTE
Pneumatic boots
must
be
regularly
cleaned
and
waxed
for
proper
operation
in icing
conditions.
Pitot,
windshield and
lift
detector
heat
should
be
checked
on
the
ground
before
dispatch into
icing
conditions,
ISSUED:
JANUARY
8,
1981
REPORT:
VB-1110
REVISED:
AUGUST 17,
1981
9 of 10,
9-53