Eclectus

This PIN female Eclectus when she is on my arm. It's not enough to pierce the skin, it looks more like a painful pinch. She PIN because the son of the owner last pass over his head to get it. She is ten months. Thank you!

It's about trust, you must earn his trust.
When the PIN, to say the second one soft, Nooo company.

Never yell or display anger, gentle every time nooo
and of course, avoid reaching above his head. Instead of teaching him to stand on command.

She is still young and if you are persistent, it will calm down soon. Talk to him a lot and often, our voices are quiet too.
Do not move really fast around her at the moment and it will stop biting.

I understand what you mean when you say that the boy would pass over his head and that his fear. All three of my Ekki of hate when someone is coming behind them, or if someone they do not know tries to caress his back. It is still very young ... then it can be easily trained to drop his bad habit. I noticed that my two girls were nervous and faster to kill if something frightens my men. My male just scream and hop away, the women put their eyes and do battle with whatever is making them upset. Remember she is still young so it may be something she is born as it matures its "child" stage.
I guess you probably have not had for all that long yet. Eclectus are very intelligent birds. Sometimes they will "freeze" and watch when they are upset, people take that as they are dumb birds. In fact, they drink in every little thing that happens around them. The main thing you want to do with it is to try to bring out you trust. And for this you must be very patient with her. Make sure you do not get angry or fustrated ... they sense it and will put your link back. A bird must be able to trust the person who handles ... they are birds of prey in a fight or flight instinct.
When you take ... take her away from his cage. Sit with her in a quiet place. Eclectus hate a lot of noise. Give him treats, take her to a window to watch, sing for her, whatever makes her feel comfortable with you and makes fun of time spent with you. Make sure you take time for it every day, let it sit with you while you watch TV or your computer, drag its delicious sweets etc. all day (which is usually a brownie point in a crow flies!) If you are operating and PIN you do not yell ouch, or get aggrivated. Say "No BITE" in a very stern voice that attract their attention ... and the difference in tone of your voice lets them know that you are not satisfied. Move your arms slightly, while you say not bite, it will catch her off guard and make him lose his balance. Make sure to say no bite at the same time you do this. Birds hate to lose their balance ... it makes them very angry. Make sure you do not move your arm that you just hit the ground ... then she will not trust that you will not drop. You try to reinforce good behavior by showing him that biting is doing something she does not like (being knocked out of balance). Each time she did if that happens, it will eventually associate the negative behavior with something negative happens to her, which should make its decision. Good luck