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This is the lock that attaches the outer combustion chamber to the fuel manifold. This wears out, lowering the combustion chamber onto the fuel feed tube to the manifold, causing the combustion chamber to crack and clearances on diffuser to be out of specification.

Shown here are badly worn outer combustion chambers.  This is caused by vibration from the propeller or turbine.  Note: photo on the left, these lugs that slide over the compressor turbine nozzle are about to fail. In this area, even the metal that was worn out, has all gone through the compressor turbine and power turbine blades.

This is a labyrinth seal on the compressor side. This turbine had been in storage for eight years, and then started. Corrosion and dirt, due to storage, damaged the white metal labyrinth seal.

These are high copper content labyrinth seals behind the fuel manifold. These were damaged by a propeller strike.

This is the fuel manifold where the outer combustion chamber is attached to.  The lips are badly worn and could possibly fail.  All metal in this section will cause damage to the compressor turbine and power turbine blades. This is normal for a 1500 hour turbine.

These are compressor nozzle guide vanes (stator) that are damaged from high temperatures from starts or prolonged operation at high temperatures.  Most 1500 hour turbines need repairs done to the guide vanes.

 For more information on turbine engines:  Page 1  Page 3