As well as the usual misunderstandings around acronyms,I've seen terrible handwriting (worse than my GP!) & some weird abbreviations just the "tick" symbol too "O C G I F",Ops check good in flight.
During the Falklands tif, RAF Harriers had Sidewinders fitted. I had a written defect "Winder FUŁ$Ked" I spent a fruitless 20 minutes playing with the stopwatch until the penny dropped (actually thats prolly me being thick!).
I'd concur with the phase of flight not recorded & perm any one from upto 4 different systems,engines - specific system not recorded.