Relevant both to the sort of problems mother nature can throw at us, and the amplifying effect of PIO on the
rear vertical stabilizer...
The pprune thread
http://www.pprune.org/rumours-news/3...urbulence.html here is unfinished but the official report
Transportation Safety Board of Canada - AVIATION REPORTS - 2008 - A08W0007 shows how close it got to another AA587 incident - bank angles of +/- 55 degrees at FL360!