broken DNS

I was hoping for some DNS wisdom, would a change in a SOA record cause a
DNSSEC broken trust chain? incorrect RRSIG?

Mike

a message of 5 lines which said:

I was hoping for some DNS wisdom,

Then this is more a dns-operations mailing list issue.

would a change in a SOA record cause a
DNSSEC broken trust chain? incorrect RRSIG?

No. The SOA record is not part of the trust chain (unless of course it
is the record you query).