POWER PLANT
SERVICING POWER PLANT
Check engine compartment regularly for oil and fuel leaks, chafing of lines, loose wires, and tightness of
parts. For engine compartment cleaning, refer to chapter 20.
ENGINE AIR FILTER
—CAUTION—
Do not use solvents or gasoline to clean air filter.
l. Removing Engine Air Filter
a. Remove front cowl scoop.
b. Unfasten quarter-turn fastener securing filter.
2. Cleaning Engine Air Filter
Check induction air filter during each preflight inspection. Clean or replace if dirty.
Replace filter after one year, ten cleanings, or 500 flight hours, whichever comes first. To clean filter:
a. Blow compressed air through filter in opposite direction of normal airflow to remove light dust
contaminants. Air pressure must be less than l00 psi. Keep nozzle at least one inch from filter to
prevent damage.
b. If filter is excessively dirty, flush filter with running water (less than 40 psi) and soak in a solution
of Donaldson D-1400 compound and water. Rinse until clear water comes through filter.
—CAUTION—
Do not use a light bulb to dry filter.
c. Dry filter thoroughly before inspection. Mechanical dryers may be used provided heated air is
circulated and maintained below l80° F.
d. Inspect filter medium for holes or tears and ensure frame provides a good air seal. Replace filter if
defects are found.
3. Installation of Engine Air Filter Install filter in reverse order of removal.
SERVICING PROPELLER
Clean and inspect spinner, backplate, and propeller surfaces regularly for nicks, scratches, corrosion, and
cracks. Remove minor nicks and scratches per instructions in chapter 6l. When necessary, paint the face of
each blade with a flat paint to retard glare. Wipe surfaces with a light oil or wax to prevent corrosion.
Inspect constant speed propellers for grease or oil leakage and freedom of rotation on hub pilot tube.
Check freedom of rotation by rocking blade back and forth through the slight freedom allowed by the pitch
change mechanism. Lubricate the propeller at 100 hour intervals in accordance with the lubrication chart.
Additional service information is found in chapter 6l.
12 - 25 - 00
Page - 12 - 12
Reissued: August 1, 1986
1D8
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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