Thanks for the info. Yes, I've seen the scabs before for a couple of seasons..

It says in text from your book if left untreated can lead to black rot. Which maybe my case.

Can you send me the picture of what it says about black eating chapter 18?

I also lost two older pear trees to firelight 5 years ago so that could have spread. Although the apples look pretty healthy with a few scabs and aren't going scorched black like the pears did.