Piper COMANCHE PA-24-180 Service Manual page 299

PIPER COMANCHE SERVICE MANUAL
7-3 Troubeshooting. Troubles peculiar to the power plant e listed in Table Vll-lll in the back of this
secion, along with their probable causes and sugerted remedies. When troubleshooting engines, ground the
magneto pnmary circuit before performing any checks on the ignition sysem.
7-4. Engine Cowling.
7-5. Removal Of Engine Cowling.
a. Ascerin that the master switch and magneto witches are in the off positon.
b. Relese the three cowl faseners on each ide the engine of the engine comparatment.
c. Remove attaching screws from the top cowl at the firewall and nose cowl.
d. Disconnect cowl attachment sraps from top cowl.
e. Remove the two attaching nuts, wahers and screw securing the top cowl channel to firewall.
f. Lift the top cowl from the engine assembly.
g. Disconnect the air bellows from air filter by loosening the quarter urn fasteners.
h. Disconnect ll drains and hoses attached to the bottom cowl.
i.
Disconnect the two support rubes from the bottom cowl.
j.
Disconnect the nose gear door retraction rod at the nose gear strut.
k. Removing attaching screws from bottom cowl and remove by pulling down and forward.
7-6. Cleaning. nspection And Repair Of Engine Cowl.
a. Clean cowling with a suitable cleaning solvent and wipe dry with a clean cloth.
b. Inspect cowling for dents. cracks, loose nves elongate holes and damaged or missing fasteners.
c. Repair all defects to prevent further damage.
7-7. Installation Of Engine Cowling.
a. Posiion the lower cowling and secure with screws to the firewall bulkhead.
b. Attach the two support tubes to the aft section of the lower cowling.
c. Attach the nose gear door retraction rod to the gear strut.
d. Connect air hoses and drain lines to the bottom cowling.
c. Attach the carburetor air bellows to the air filter with quarter turn fasteners.
f Position the top cowl on the nose secnon and secure the two cowl channels
screws, washers and nuts.
g. Secure the top cowling to the firewall bulkhead and nose section with screws.
h. Attach the top cowl hold down straps to each cowl support channel.
to the firewall with
7-8 Propeller.
CAUTION
Before performing any service functions on the propeller. scertain that
the masuter swircn is "OFF", the magneo switches are "OFF"
(grounded) and the mixrure control is in the "IDLE CUT-OFF"
position.
POWER PLANT
ISSUED: 8/18/72
2A13