Split Atom what part of this don't you understand?
You get damaged, you have a choice. Land and exit, or stay and do the best you can knowing your chances of dieing are greater. Its that way for you, its the same way for him. You make it possible for you to repair, and him to repair what have you accomplished?
If you have an oil leak its a question of if you can or not make it back to a friendly base.
If you did, count your blessings and call it a night. You don't get to magicly repair your plane or steal someone elses and go back up again. its a one life, one plane event, damage or lose yours and your done, period. Its a REALISM thing. To do what you want for FSO would severely impact gameplay.