enginehistory.org

[rwahlgren]

Was reading about a DC-7B that was to be ferried, but to do so they had to lease an engine, and then during the test flight a few days ago they lost another engine. No details of course for us engine types. If there are people here that have a lot of experience with them it would be interesting to hear what you have to say about the failure modes of those engines.
It would have to be a major failure to require replacement.
Master rod bearings?

[jschauer]

Most of the failures I've encountered were the engines making metal. Most of the metal parts were from the nose case gear reduction. The early BA Wright R-3350s had a weak gear setup and the later post war CA Wrights were beefed up.

[wstuddert]

I recently experienced an engine overspeed that resulted in, caused by, the failure of lubrication to the front balance weight bearing. It was a bit of a mystery as the oil flow to the bearing was good when tested static, pumped oil through the system using the preoiler system. The only possible cause was a sludge buildup in the end of the crank shaft.

[wstuddert]

I recently experienced an engine overspeed that resulted in, caused by, the failure of lubrication to the front balance weight bearing on a -93 engine. It was a bit of a mystery as the oil flow to the bearing was good when tested static, pumped oil through the system using the preoiler system. The only possible cause was a sludge buildup in the end of the crank shaft.