Did you hear about the Shackleton that arrived back at base with all four engines running? The pilot had to shut one down as he didn't know how to do a four engine landing.
To be a bit more serious, I was filling out the ground engineer section of the Form 1022 for an in-flight shut down incident: the diaphragm of an oil pressure transmitter had ruptured, with the result that engine oil was steadily ejected through the breather vent. I had a chuckle at the following sentence in the aircraft captain's report - "Starboard beam lookout reported that No.4 was leaking more oil then usual"