The Airbus memo referenced in a New York Times article today appears to be different than the report cited in a recent thread regarding structural design loads on the A300 fin. Some of this may be 'blame game' maneurvering before the NTSB hearing later this month on AA587, but it does seem a bit untoward that Airbus, based on its analysis of an earlier incident, kept internal a memo warning that swinging the A300 rudder may result in the fin failing.
It seems to me that the applicable words to the issue are contained in this quote lifted from the memo.
"If the pilots didn't know it, it isn't for our lack of trying," he said. He acknowledged that the advice concerned not using the rudder, and not the more specific case of using the rudder in alternating directions. But, he said, "there is no good piloting reason to use alternating rudder, none, in the history of aviation."