RR Merlin: Shock-loading damage in service use

[INM@RLM]

I'd be most grateful for a small help in locating the title of this book.

Memory is fallible but this is what I think I now recall.

During the 1990s I began reading a book written by an RAF Erk who served on a fighter squadron. (I think beginning in the BoB.) It included some interesting remarks based on personal experience as an engine fitter of the high incidence of shock-loading damage to Merlins in fighters. I do not recall this aspect ever being even mentioned in any of the usual works about the Merlin engine.
My copy of that book was probably lost in a house-move but I would dearly like to now refresh my memory and finish reading it.

It was not Bertram Hughes: 'An Erk Goes to War' (who did serve with No 145 Squadron flying Spitfires, however, he was not posted to this squadron until Jan-41). Plus I have just finished reading this book as a double-check and Hughes was an airframe rigger not an engine fitter.

Many thanks to any kind soul that can clear away my cobwebs.