PIPER
COMANCHE
SERVICE
MANUAL
7B-3.
Troubl
..
bo(nin,.
Troubl
..
peculiar
to
the power plant
....
listed
in
Tlble
VlIB-1I
in the back
of
this
section.
aloftJ with their probable causes
""d
sugested remedies.
When
troubleshoocinJ mJincs.
I'ound
the
rnapero
pnmary
cirCUit
before performiDJ
""y
cbew
on the iJnition system.
7B~.
Removal
Of
EqiDe
CowliaJ.
a.
Release the quarter rum
futmen
securins the· side eowlinJ
to
the
bottom
cowl..
b.
Remooe
screws
at the front
and
aft
ends
of
the
top
cowl.
c. Remove the
twO
nutS. washen
""d
screws artadtiftJ the top cowl
to
the firewall
firtinp.
d. Lift the
tOP
cowl from the enJiDe assembly.
e. Remove
the bottom cowl access p ..... l by
100ICIIinJ
the quarter
rum
fasteam.
f. Disconnect air intake h
.....
""d
dnin
line from
the
nose cowl.
,.
Disconnect cowl flap control clbles.
h. Remove
bottom
cowl by removins screws ICCUrinB
bottom
c:owlins
at
the
firewall, nose cowl
a.nd
landiDJ
gear
doors.
I.
Remove the nose cowl by pulling out
hinF
pins and sepantiftJ it
at
the
hiDJe.
7B-5.
C1eaniDg.
Inspection And Repair
Of
Engine Cowl.
a.
Clean cowling with a suitable cleaning solvent and wipe
dry
with
a clean cloth.
b.
Inspect eowlinJ for dents. cracks. loose rivers. elongated holes and damaged or
missing
fasteners.
e.
Repair all defects to prevent further damage.
7B-6.
Installation
Of
Engine CowliDs.
a.
POSition
the nose cowl halves on the front
cf
the enJine and secure with hinge pins.
b.
Raise the
bonom
cowl into position and secure with screws to the
tlrC!wail.
nose landing gear door
frame and the
i10K
cowl.
c.
Connect air hoses
[0
nose cowl and drain line to the bottOm cowl
d.
Connect cowl flap control cables.
C!.
Install the
tOP
cowl and secure
suppa"
channels to fuewail fittings with
twO
screws. washers and
nuts.
f. Secure the fore and aft ends
of
the top cowl with screws.
g.
Install the
bonom
cowl access plate and secure with quarter rurn fasteners.
7B-7.
PropeUer.
CAllTION
Before performing any service functions on the ?ropellcr. ascertain that
the master
SWitch
is
"OFF".
the magneto switches
a.re
"OFF"
grounded
and the mixture concrol
is
in
the "IDLE
Cl'T-QFF"
position.
2
E21
POWER
PLANT
ISSUED:
Bl18m
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