While taxiing for take-off in a 172 with the Lycoming 320 H engine I noticed that the oil pressure was progressing towards ZERO. I returned to the ramp and upon further inspection the oil filter was filled with metal. The oil pump had come apart.
I was flying A 76 with the Rolls Royce (ALlison) 250-C30 engine when It started making a loud howling noise. We continued to a landing and while taxing in we got a chip light. Further inspection revealed a bearing was coming apart -not sure which number.
I have had other countless chip lights without resultant engine failures.
I currently operate (fly) an aircraft with a RR 250-C20 and another aircraft with a Pratt and Winney PT6. I haven't had a chip light for quite a while. I hope I didn't jinx myself!