Troubleshoot a plane engine noise while doing maintenance

You are an engineer at a flying company. At the moment, you’re in a hangar where a plane is waiting for you to do a regular maintenance before flying off tomorrow morning.

You change the oil and test the engine, but hear it working with a different sound than usual.

Main challenge is to figure out as soon as possible why this is the case, as well as to make sure that this problem doesn’t come from some other source in the plane. Otherwise, you need to give late notice that the flight has to be canceled.

At the end of this training, you should have better knowledge of plane maintenance, as well as better understanding of actions to be taken when a flaw is found.