Reserve funds and how they build up
How a reserve fund accrues against the hours an aircraft flies, how drawdowns work, and how the engine assessment keeps the balance honest.
Last reviewed
A reserve fund is money set aside now for a cost you know is coming later: an engine overhaul, a propeller, an ARC. In FlyerOS the fund is not a spreadsheet someone updates by hand. It builds up automatically from the hours the aircraft actually flies.
How it accrues
You set a rate per hour for each fund. Every flight that closes out adds to the fund at that rate, using the hours recorded at close-out. The fund grows with use, so the aircraft that flies more contributes more, which is exactly how a shared cost should fall.
Drawing down
When the cost arrives, you record a drawdown against the fund: the overhaul invoice, the new part, the inspection. The balance drops by what you spent, and the history shows what the money was for. Nothing leaves the fund without a reason attached to it.
The engine assessment
An engine reserve is only as good as its estimate of what the overhaul will cost and when it is due. The engine assessment holds that estimate against the hours flown and the hours remaining, so you can see whether the fund is on track to cover the bill or falling behind. If the rate is too low, you find out with time to change it, not on the day the engine comes due.
Who sees it
Members see the funds their flying contributes to on their own record. Staff with finance permission see every fund, its rate, its balance and its history.