Your Crew Chief will never be able to find the same thing wrong with your aircraft that you do. Your aircraft is, in reality, your Crew Chief's aircraft. If you take a hill one day, you will be ordered to withdraw on the second, and then ordered to re-take the hill on the third. If you request a transfer you will be denied. If you want to stay where you are, you will be transferred.
Tracers work BOTH ways.
When in doubt, empty your magazine. You are not a superman. If it's stupid but works, it's not stupid. Don't look conspicuous, it draws fire. If your attack is going really well, it's an ambush.