First of all, apologies to Hopharrigan for my being irritated. My problem not his. He's just being extra careful.
Yesterday I got the Boeing Flight Ops Tech Bulletin ATA Number 01, dated 1 November 1999. It applies to every single Boeing civil transport in existence. It's a pdf file (Adobe). Takes less than 60 secs to download.
Also found 3 page article entitled "Lies Your Barometric Altimeter Tells You" on page 98 of October 1999 issue of Business & COmmercial Aviation. (Same McGraw-Hill publishers who do Aviation Week).
Also urge Prunners, Hopharrigan included, to download Adobe file of Canadian advisory at canuck_av8r's website at Geocities.
I think that the abovementioned 3 written references take the wobble out of the stool, so to speak.
Best of luck, Hopharrigan, in your ongoing self-education. Like the rest of us.