Piper CHEROKEE 180 Owner's Handbook Manual page 35

SECTION III
CHEROKEE 180
NOTE
To
read
power from
the
Power
vs.
Density Altitude
Chart in
this manual, add
50
rpm to the value
observed on the tachometer
when the air conditioner
is
operating.
The climb
performance
of Cherokee
180 is
not compromised
measurably
with the air conditioner operating
since
the compressor
is
de-clutched
and
the condenser
door
is retracted, both
automatically,
when
a
full
throttle
position
is
selected. When
the
full
throttle
position
is
not used or
in
the
event
of
a malfunction
which caused the
compressor
to
operate
and
the
condenser
door
to
be
extended,
a
decrease in
rate
of climb
of
as much
as
100 fpm
can
be
expected.
Should
a
malfunction
occur which
prevents
condenser
door
retraction
when the
compressor
is
turned
off, a
decrease in
rate
of
climb
of
as
much as
50 fpm
can
be
expected.
32
761513
720615