With jet engines, the manufacturers are surprisingly candid. The potential liability for attempting to coverup an issue that would render the engine inoperative would be huge.

GE determined that their fatigue life of the very central rotor (3-9 spool) in the middle of the compressor is not satisfactory. This happened on one of their most popular engines that power more than 50% of the B-767's that are flying. The cost to gradually remove each engine from the fleet and replace the spool were outrageously high. And, it could not be accomplished for nearly two years due to the new parts were not immediatly available.

But, the consequences of ignoring the problem are unacceptable.

Contrast this to the consequences of ignoring a connecting rod with a marginal fatigue life.