Hi Ian,
I am a 747 Captain and have been flying for 30 years. I have no association with PAL. But upon reading this post I commend you on your courage and wish to tell you that all of us have made mistakes some bigger than others, and that your attitude toward this incident is admirable and that I am sure you will be a better and safer Captain following your internal reflection of this matter. Additionally you will have an understanding of the emotional aspect and will in the future be able to understand the feelings of others.
So amigo hang in there and all will be well as the investigation is only there to improve safety, training and SOP policy. It is not designed to be a witch hunt with a burning at the stake. Btw I would be proud of you if you were my son.
Cheers,
Wooblah.