What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The engine had approximately 1300 hours since overhaul. Overhaul is at 1700 hours. During engine disassembly the number two main bearing shows that the bearing spun in the house. The main bearing lock tab was completely gone and the tab lock on the case halves was worn. The number three main bearing tab lock on the case halves had wear also. The case shows signs of fretting on the number 1, 2, and 3 main journals. The number 2 rod separated completely from the piston. The number 1 rod separated from the crank and the 3 rod had on bolt holding it to the crank. The case had a hole above the number 1 and 2 cylinders. The oil passages were checked and found to be open. The oil pump housing showed signs of wear.
As the FAA filed it
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
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N6108Y · 1
Matched to the same aircraft by N-number and date.