When you are in a vehicle and on the runway or the tarmac of any airport or airstrip, you can request Repair and Refuel services to come to you*. When requested, a vehicle will approach momentarily and it 'should' repair or refuel your vehicle for you.

*Repair option appears only when the vehicle is damaged. Refuel option only appears when vehicle is below 40% fuel.

You might need to move closer to the vehicle if it doesn't stop in the right spot. And once it's done it will just stay there for now. But you can move to a new location and request it again if you need it to move out of your way.

Optionally, when in a plane, you can simply taxi your way to any of the repair vehicles and once within their range it should work.

ACE Users: You will need to exit the vehicle and manually refuel your vehicle even after you request it. Automatic refueling is disabled by default.