Piper PA-24 Comanche Service Manual page 485

•
•
•
PIPER COMANCHE SERVICE MANUAL
TABLE
vnc-n.
TROUBLESHOOTING CHART
(COIlt.)
(INGlNI-TUUOCHAllGED)
Trouble
e-
Remedy
Airplane performance
May be ciue to hot
Speed for the TlU'bo
is reduced from weather.
COllWlche
will
be
normal.
reduced 2 to 4 mph
for 10° F riJe in
tempeftNre above
It&Ddatd
day. This
is
because Turbo-
chUJUS, like
Nrbina. arc hat
leftlic:m: u to per-
formance.
Tired eJllinc. or OUt
R.epair
CDline u
re-
of Nne.
quircd.
Airplane may have
laspect airframe and
additioDll
drat
due repair u necessary.
to radio anrcnna.
uainI
,ear
or
flapl. OUt of ring.
etc.
Fuel consumption is
Mixture SCt tOO rich.
Develop proper leaning
higher than normal.
technique.
Leak in fuel system. Locate and repair leak.
Prolonpd hich power Reduce power and lean
at
full
ricb mixture.
for fuel economy.
HOt weather.
Hot weather
will
naN-
rally incrnsc fuel
consumption 2 to 4
GPH
dcpendinC
on
power. leaning and
temperature of the air.
This is due to less
dense air for the same
MAP. Also it hu been
found from tcstS that
slithdy richer mixture
should be used for ex-
tremely warm weather
to maintain a lower
head temperature.
This
will
insure good
encme life.
POWER PLANT
ISSUED: 8/18172
2
19