Piper Comanche PA-24 Service Manual page 613

PIPER COMANCHE SERVICE MANUAL
Trouble
Loss of. reduction of.
or fluctuation of
manifold pressure
wllile turbocbarging.
Loss or reduction of
fuel pressure when
rurbocb ... mg
TABLE VIIC-ll. TROUBLESHOOTING OlAJlT (con .. )
(ENGINE-TUlUIOCIIAIlGED)
Calle
MalfwIcti0DiDs 1D&IIi-
fold p ....... re
puae
due to faulty pu .. or
possible oil in .'tIAP
reference liDc or
.....
Turbocharger Wet
duct block.d.
1 urbocompressor
dis-
cb .... duct ruptUred
or disconneCted.
Sevc~
Npturc on ex·
haUSt
sua.
causiDg
waste
pte
to be
in-
eff.ctiv •.
Turboc~r
rotor
jammed.
Ruptured manifold
pul'" line or fittlng.
Broken wlSte pte
control.
Out of fu.1.
Partial fuel v.por lock
at
hieh altitude due to
hot fuel and bigh power
oenings.
MalfunctionIng fuel
pressure regulating
valve or fuel pump.
Ruptured fuel line or
leaking fitting or
pump ,haft se3.l.
2 17
Remedy
Repair or replace
p"",. NOTE, If the
.".me cbanJa in
power level or the .ir·
speed
cb&nJeS.
th.n
..... al cbanl" in MAP
occurred due to
one of me reasons
listed below,
Ch.ck ductinJ and reo
move obstructlon.
Coanect or replace
ductint!.
Replace defective part.
R.place Turbocb ... er.
Repair leak.
Replace concrol cable.
Refuel.
Turn on boost pump
andlor reduce power.
Tum on boose pump
andlor reduce power
Shut off fuel shut-off
valve. full nch mixture
until fuel forward of
firewall is consumed
by
engine. Secure engine.
POWER
PlA~T
ISSU ED: 8/18/72