Oil Filter Inspection; Identification Of Metallic Solids After Oil Servicing; Visual Inspection Of The Oil Filter Element And Oil Suction Screen - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual

12. Oil Filter Inspection

NOTICE: There can be small screen molded within the propeller governor gasket. Remove this
gasket and look for particle contamination on the propeller gasket screen. Replace with
a new propeller governor gasket.
Cut open the removed oil filter canister with an approved tool (e.g., for full-flow filters, use
A.
Champion Tool CT-470) per the tool manufacturer's instructions.
Remove the paper element from the oil filter.
B.
Carefully cut the paper element at each end of the body.
C.
Carefully unfold the paper element to prevent loss of collected particles which can
D.
compromise the integrity of this inspection.
Examine the material trapped in the filter. Look for shiny metallic particles/residue, shavings
E.
or flakes. Refer to the sections: "Identification of Metallic Solids After Oil Servicing" and
"Visual Inspection of the Oil Filter Element and Oil Suction Screen" in this chapter.
Record all inspection findings and any corrective action in the engine logbook.
F.

13. Identification of Metallic Solids After Oil Servicing

Identification of the nature of the metallic particles found in an oil filter element or oil suction
screen during an oil change is helpful as a diagnostic method. The metallic particles can be an
early indication of wear or damage to engine components such as cylinders, bushings, piston
pins, etc. ("Metallic particles" herein include metal particulates and/or chunks, chips, flake, hair-
like strands, shavings, etc.)
Identification of the metallic particles is a progressive approach that begins with a visual
inspection that can be followed with basic chemical analysis or more in-depth analysis or directly
with component examination and subsequent corrective action.
NOTICE: For spectrometric oil analysis to be an effective diagnostic tool, Lycoming Engines
recommends that oil samples must be taken and analyzed at each oil change.
Contact Lycoming Engines' Technical Support at the phone numbers at the front of this manual,
if:
• The cause of the metal contamination cannot be found
• If the next two oil analyses show progressive increases in aluminum or iron content,
complete a "Visual Cylinder Inspection" and/or "Cylinder Borescope Inspection" on each
engine cylinder per Chapter 72-30.

14. Visual Inspection of the Oil Filter Element and Oil Suction Screen

When metallic particles are found on a filter element or screen, a visual inspection of the metallic
particles on the filter element or oil suction screen is to be done to help identify and narrow the
root source of affected engine components subject to wear or damage. The visual inspection
includes four attributes:
Size - "Chunks" are metallic particles larger than 3/16-inch in size; chips are smaller than
chunks. Chunks and chips require immediate analysis. Yet metallic particles can be small dust-
size particulates - that is where quantity becomes more of the issue in this case.
© 2018 Avco Corporation. All Rights Reserved
November 2018
12-10
Page 73