Loss of Lubricity

Sadly, we don’t get to see this too often - early stages of component deterioration which ultimately will lead to a catastrophic result. When a catastrophic failure occurs valuable evidence is lost.  Unfortunately this lack of evidence limits accuracy of the conclusion resulting in an indeterminate root cause, or at best ‘probable cause’. In this case dB(i) recommended to pull the engine down based upon external indicators; to find that bearing failure had just begun. Another few minutes of run time would have resulted in exponential deterioration - high probability of a connecting rod through the side. “We are all experts with benefit of hindsight” Foresight should be practiced also. We try!. “If you cannot see, look!”