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25-Hour Initial and Routine Engine Inspection Checklist (Cont.)
Inspection Item
Calculate oil consumption.
Change the oil.
Replace the oil filter.
Examine the oil sump suction
screen and oil filter for
blockage.
NOTICE: During the first hours of service, engines can have some leakage at the cylinder
head. This initial leakage is not harmful or detrimental to the engine.
Examine the engine and
nacelle for fuel or oil leaks.
05-20
Page 16
Refer to the section "Oil
Consumption" in Chapter 12-
10.
If oil consumption has
increased, complete the
"Cylinder Borescope Inspection
Procedure." Refer to Chapter
72-30.
Complete this 25-hour
Inspection again until oil
consumption stabilizes.
Refer to the section "Oil
Change Procedure" in Chapter
12-10.
Refer to the section "Oil Filter
Replacement" in Chapter 12-10.
Remove any blockage and clean
the oil sump suction screen.
Identify the cause of any
blockage and correct the
problem. Refer to the sections
"Oil Suction Screen
Removal/Installation" and "Oil
Filter/Oil Suction Screen
Inspection" in Chapter 12-10.
EXAMINE THE OIL SUMP SUCTION SCREEN AND OIL FILTER
ELEMENT FOR UNWANTED METAL PARTICLES. A CLOGGED OIL
FILTER AND/OR SUCTION SCREEN CAN CAUSE ENGINE FAILURE.
CORRECT ALL LEAKS. IF FUEL OR OIL LEAKS ARE NOT
CORRECTED BEFORE FLIGHT, THE ENGINE CAN HAVE LOSS OF
POWER OR ENGINE FAILURE CAN OCCUR.
Refer to the section "Oil Leak
Check" in Chapter 12-10. If a
leak is found, identify and
correct the cause of the leak.
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Comments
© 2021 Avco Corporation. All Rights Reserved
Results/Notes
Done
February 2021
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