Save the Airplane

You are flying to Australia to see your grandmother for her birthday with your friends, when you find out that the pilot died in the cockpit and the copilot is locked out because he went to the bathroom. You find a box called “cockpit keys”, but it has 5 different combination locks that only the pilot knows about. You look out the window and see that you are slowly nearing the ground. You estimate 45 minutes until you will crash. You have to break into the box and get the keys so that the copilot can rescue the plane and all 180 people aboard.