[Arjay1949]

I'm attaching a copy of the reverse of the AM1180 accident record card for JP 137, in the hope that someone can explain abbreviations I have highlighted.

I'm guessing that the highlighted section of the Additional Evidence section reads :

'C of I' (Court of Inquiry?) followed by what looks like a mathematical division sign, and then a '%' sign. Both before the words 'mechanical failure'.

Any idea what they might refer to??