40 mins hold fuel for a Mil FJ and div fuel, no way, far too impracticable for day to day ops
- back in the days of the Lightning (aaahhh!) you woud be lucky to take off with fuel for 40 mins flying time.
At Leuchars in days of old we carried an IFR diversion fuel (normally Lossie), one approach and go, and we used Edinburgh as a 'crash' alternate ie someone has blocked the runway at Leuchars when you are in the circuit.
Crash diversion fuel for the Lightning was 800lbs and involved shutting down one engine to get there on a Mayday. I suspect yer modern jet is a bit better, but I'd be surprise if they had 40 mins holding!