Not a problem, glad to be able to assist!
The Form 540 (Operational Record Book) gave the day-to-day happenings of a Squadron or Station, everything from postings in/out, to accidents.
There were frequently two (or more, depending on how many units were resident there - each would have its own ORB), one for the squadron, and one for the Station itself.
WW2 aircraft losses are one of my interests; I even have a website documenting some of the losses in my area.
Don