What was found
(CAN) AFTER A REFUELING STOP THE PILOT TRIED WITHOUT SUCCESS TO START THE AIRCRAFT. THE ENGINEER DID A VISUAL INSPECTION OF THE ENGINE AND NO FAULT WAS FOUND. DURING A SECOND START ATTEMPT AN AUDIBLE "CLUNK" WAS HEARD AND NO ROTATION OCCURRED. THE STARTER WAS REMOVED AND AN ATTEMPT TO ROTATE THE STARTER DRIVE WAS UNSUCCESSFUL. THE INTAKE WAS CHECKED FOR F.O.D., THE COMPRESSOR WAS CLEAN. AN ATTEMPT TO TURN THE COMPRESSOR BY HAND WAS ALSO UNSUCCESSFUL. THE ENGINE WAS REMOVED AND TEARDOWN REVEALED A DAMAGED 2ND STAGE SPACER BETWEEN THE 2ND AND 3RD STAGES OF COMPRESSION.