Martin the Martian (#3),
One for your Pembroke book, then:
I was air-trafficing at Leeming around 1970. A Pembroke took off from Catterick (Still an acive airfield then), and immediately announced an emergency: they had lost an engine. As we were only a few miles South of them, and as they were heading in our direction anyway, they chose us, we cleared the circuit and they landed safely on one on our 16.
The Nav came up to the Tower to "make his number". "What's with the donk?", I asked, "Lose oil pressure?" ... "Lost a pot!" he replied. It was true, a whole cylinder had blown off the Leonides: the projectile had gone through both (?) cabin walls without hurting anyone.
The 'punch line"? It was carrying the CinC of Maintenance Command back to his HQ! ... How we laughed!