Hi. Taxying out - noticed the fuel caps were undone - I had checked the fuel but not cancelled after - superb reality.
I presume there are hydraulics on the aircraft - raising/lowering U/C - brakes - maybe flaps and flying controls - don't know though.
As an ex Aircraft Technician of many years lots of our time was repairing hydraulic systems - topping up reservoir - leaks - valve changes - charging accumulators etc.
If there are hydraulics maybe they could be included in maintenance.