Piper Cherokee Six - Rate of Climb Indicator

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
9-25.
REMOVAL
AND
REPLACEMENT.
(Refer
to
Paragraph
9-74
of this
section)
9-26.
RATE OF
CLIMB
INDICATOR.
9-27.
GENERAL.
The
rate of
climb
indicator
measures
the rate
of
change
in static
pressure
when
the
airplane
is
climbing
or
descending.
By
means
of a
pointer
and
dial,
this
instrument
will
indicate
the
rate of
ascent
or
descent
of
the
airplane
in
feet per
minute.
But due
to
the
lag
of the
instrument,
the
aircraft
will
be climbing
or
descending
before
the
instrument
starts
to read
and
the
instrument
will
continue
to
read
after
the
aircraft
has
assumed
level
flight.
In
rough
air this
should
not be
considered
a malfunction.
9-28.
TROUBLESHOOTING.
TABLE IX-IV.
RATE
OF CLIMB
INDICATOR
Trouble Cause
Remedy
Pointer
does
not set
on
zero.
Pointer
fails
to
respond.
Aging
of diaphragm.
Obstruction in static
line.
Reset
pointer
to
zero
by means
of
setting
screw.
Tap
instrument
while
resetting.
Disconnect
all instru-
ments
connected
to the
static
line.
Clear
line.
Pitot
head
frozen
over.
Water
in static
line.
Obstruction
in
pitot
head.
Check
individual
instru-
ments
for
obstruction
in lines.
Clean
lines
and
head.
Pointer
oscillates.
Leaks
in static
lines.
Disconnect
all instru-
ments connected
to
the
static line. Check
individual
instruments
for
leaks.
Reconnect
instruments
to static
line and
test installa-
tion
for leaks.
Defective
mechanism.
Replace
instrument.
INSTRUMENTS
Issued:
8/17/72
2K16