(Derek Lyons) wrote in
:

"Jorge R. Frank" wrote:

Flight Rules often have updates called Page Change Notices (PCNs).
These only replace the changed from the existing book. The Flight
Rules can sometimes accumulate several PCNs before the book gets
republished.

nods Same thing we had, except they were called simply 'changes'
with occasional 'revisions' when there was a large change. We also
had 'message changes', which were essentially memos to change one or
two lines.

We have those as well, but we call them "pen & inks".

After some of the rules there is an 'R' in a circle, followed by a
number. What does that stand for?

I'm not 100% sure, but I think it's used to mark a rule that has been
revised. The first six digits of the number are the date of the change
(mmddyy), followed by a dash, then the Change Request (CR) number.

--
JRF

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