Cylinder Maintenance; General; Visual Cylinder Inspection - Lycoming TEO-540-C1A Maintenance Manual

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

1. General

A. Complete the inspections identified in Table 1 at the regularly scheduled interval per
instructions in this chapter.
B. Record all findings and any corrective action on a copy of the respective Engine Inspection
Checklists in Chapter 05-20 and in the checklists in this chapter as records of inspection.
Procedure

Visual Cylinder Inspection

Cylinder Compression Check
Intercylinder Baffle Inspection
Cylinder Borescope Inspection
Exhaust Valve and Guide Inspection on
TEO-540-C1A engines
2. Visual Cylinder Inspection
A. Examine the cylinder and cylinder head (Figure 1) thoroughly for cracks, leaks, rust, pitting
and/or damage. Replace a damaged, rusted, pitted, leaky or cracked cylinder per instructions
in this chapter.
B. Look for loose, damaged or leaking crankcase thru-studs. If loose, damaged or leaking
crankcase thru-studs are found, send the engine to Lycoming Engines.
C. Look for loose or damaged cylinder hold-down studs. If loose or damaged cylinder hold-
down-studs are found, replace with appropriate oversize studs per Appendix A.
D. Look for loose or damaged spark plug Heli-Coil
found, replace the Heli-Coil
E. Look for cracked or broken fins and baffles (Figure 1). If a cooling fin adjacent to the exhaust
port flange is cracked, a 3/16 in. (4.76 mm) diameter hole can be drilled as a stop, under the
following conditions:
• The end of the crack is at least 1/4 in. (6.35 mm) from the base of the metal; or
• The cracked area can be removed from the fin, provided the maximum removal is no more
than one-half the total fin width; or
• No burrs or sharp edges are in evidence; or
• The minimum fillet at the root of the removed portion of the fin has a 1/4 in. (6.35 mm)
radius, and the minimum corner at the top of the fin adjacent to the removed portion has a
1/2 in. (12.7 mm) radius; or
• There is no more than one crack per fin and its depth is not longer than 1/4 in. (6.35 mm)
from the base of the metal, and a fin stabilizer is used to reduce vibration and prevent
further deepening of the crack.
© 2018 Avco Corporation. All Rights Reserved
November 2018

72-30 - CYLINDER MAINTENANCE

Table 1
Regularly Scheduled Cylinder Inspections
per the "Heli-Coil
®
Frequency
After every 100 hours of engine operation
After every 100 hours of engine operation
During every visual inspection
After every 400 hours of engine operation or
as necessary for fault diagnostics
After every 1000 hours of engine operation
®
inserts. If a loose or damaged Heli-Coil
Replacement" procedure in this chapter.
®
®
is
72-30
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