Cheers, Whirlybird.
I did have a quick search but never found it, however on looking again found it this time:
it's in JAR 3.145 (Subpart B) page 35
"Incomplete Right Bundle Branch
Block
This does not require investigation. The
RBBB algorithm only applies to
complete right bundle branch block."
I was starting to wory reading this thread, thought I would need countless extra tests (& £££££'s). Should have trusted my AME!
Cheers MM