From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,da26f7e99d6cfcf3 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-04-07 06:18:01 PST Path: supernews.google.com!sn-xit-03!supernews.com!cyclone-sjo1.usenetserver.com!news-out-sjo.usenetserver.com!e420r-sjo4.usenetserver.com!news-out.usenetserver.com!newshub2.rdc1.sfba.home.com!news.home.com!news1.rdc1.sfba.home.com.POSTED!not-for-mail Message-ID: <3ACF132F.95DD191A@home.com> From: Mark Biggar X-Mailer: Mozilla 4.76 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: software failure question References: <9Pxz6.992$ix4.198187@news1.rdc1.sfba.home.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Sat, 07 Apr 2001 13:16:02 GMT NNTP-Posting-Host: 65.3.211.243 X-Complaints-To: abuse@home.net X-Trace: news1.rdc1.sfba.home.com 986649362 65.3.211.243 (Sat, 07 Apr 2001 06:16:02 PDT) NNTP-Posting-Date: Sat, 07 Apr 2001 06:16:02 PDT Organization: Excite@Home - The Leader in Broadband http://home.com/faster Xref: supernews.google.com comp.lang.ada:6609 Date: 2001-04-07T13:16:02+00:00 List-Id: tmoran@acm.org wrote: > > Anyone know where this came from? > "In one infamous software error, a misplaced minus sign resulted in a > fighter jet's control system flipping the aircraft on its back whenever > it crossed the equator. " It was the fly-by-wire software for the F-16. Fortunately, this error was caught in simulation and no planes were actually flipped. For more info, you might want to look in the risks-digest report database "http://catless.ncl.ac.uk/Risks". The bug in question can be found easly by searching on "equator". -- Mark Biggar mark.a.biggar@home.com