As far as I know depreciation of flight equipment only occurs when you own a place.
Yet despite only leasing planes I suddenly got a large cost for depreciation of flight equipment, a cost I have not had during all the other weeks of my operations!
I just wish to know where this cost came from, as it could possibly lead to a rescue loan as I took a risk getting a new plane (a large airline just closed in ellinikon flooding the plane market) with not much money in stock.