Gary, Gary, Gary, You don’t need a $30,000 GPS simulator to verify if a GPS product in your inventory has the rollover bug. You simply ask the supplier to certify that they don’t have the rollover bug. They use their _$100,000_ GPS simulator If needed, but usually it’s done with a trivial code review.
If the supplier can’t provide such a certification, then they are no longer a supplier. This tends to persuade them to certify. If you as an air carrier (or any other critical GPS consumer) fail to ask for such a certification in time to field a replacement, that’s your fault. You might not be aware, but zero US air carriers had any unplanned downtime from the GPS rollover. I can’t say the same thing for certain Asian air carriers :) -mel via cell > On May 1, 2019, at 8:39 PM, Gary E. Miller <g...@rellim.com> wrote: > > Yo Mel! > > On Thu, 2 May 2019 03:30:03 +0000 > Mel Beckman <m...@beckman.org> wrote: > >> I’m also an FAA licensed A&P mechanic, and have worked for airlines >> in fleet maintenance. Air carriers have extremely thorough systems >> reviews, by law, through the Airworthiness Directive program, which >> started identifying 2019 GPS rollover vulnerabilities in ... 2009! >> Nobody was surprised. If any GPS systems “went nuts”, it was through >> the incompetence and negligence of their owners. > > How many GPS owners happen to have $30,000 GPS simulators to check > their $300 GPS/NTP servers? Some of mine did, most did not. > > Seems to me the negligence is in the GPS manufacturer that failed to > notify their customers. > > To be fair, Avidyne and Telit did notify their customers, but not with > a fix or enough lead time to swap out the units. > > RGDS > GARY > --------------------------------------------------------------------------- > Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 > g...@rellim.com Tel:+1 541 382 8588 > > Veritas liberabit vos. -- Quid est veritas? > "If you can’t measure it, you can’t improve it." - Lord Kelvin