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Scott - a side note to clarify things... <br>
<br>
The 737 Max8 problem was NOT due to lack of testing or
non-incremental changes. The system was well tested and put through
it's paces. It was a lack of proper pilot training in the aircraft
and its systems and some carriers choosing to NOT purchase specific
flight control options.<br>
<br>
Full disclosure - my classmate was the Chief Test Pilot for the MAX8
and another classmate is the current FAA Administrator.<br>
<br>
But I digress - sorry...<br>
<br>
If you look at 5G deployments around Japan and Europe, generally
they are NOT right up next to major airports.<br>
<br>
I would like to ask ATT and Verizon senior leadership to put their
loved ones onto a commercial aircraft that is flying into ORD during
a blizzard on a Zero-Zero landing (the pilots relying on radio
altimeters) and the 5G network up and running and then ask how
confident they are that NOTHING will interfere and 5G is perfectly
safe.<br>
<br>
Geoff <br>
<br>
<div class="moz-cite-prefix">On 1/19/22 14:37, Scott McGrath wrote:<br>
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<blockquote type="cite"
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<div dir="auto">I’m guessing you are not a pilot, one reason
aviation is resistant to change is its history is written in
blood, Unlike tech aviation is incremental change and
painstaking testing and documentation of that testing. </div>
<div dir="auto"><br>
</div>
<div dir="auto">When that does not happen we get stuff like the
737 Max debacle</div>
<div dir="auto"><br>
</div>
<div dir="auto">Aviation is the antithesis of ‘Move fast and break
things mentality’ for a very good reason safety.</div>
<div dir="auto"><br>
</div>
<div dir="auto">On my flying club’s plane every replacement part
comes with a pedigree which is added to the plane’s maintenance
log upon installation and the reason for removing the old one
recorded </div>
<div dir="auto"><br>
</div>
<div dir="auto">Imagine how much easier our networks would be to
maintain if we had records down to the last cable tie in the
data center. If there was a bug in a SFP+ for instance all of
them, when they were installed and by who and what supplier they
came from was readily available sure would make my life easier. </div>
<div dir="auto"><br>
</div>
<div dir="auto">The reasoning behind that massive pile of
documents (pilot joke ‘a plane is not ready to fly until the
weight of the paperwork equals the weight of the airplane’) is
that if a failure is traced to a component all of them can be
traced and removed from service.</div>
<div dir="auto"><br>
</div>
<div dir="auto">On a Airbus for instance all the takeoff and
landing safety systems are tied to the RadAlt. The EU has
strict rules about where the c-band can be used as does Japan
both use the 120 second rule c-band devices not allowed in areas
where the the aircraft is in its beginning/ending 2 minutes of
flight.</div>
<div dir="auto"><br>
</div>
<div dir="auto">So the REST of the world got c-band right the US
not so much</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
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<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Jan 19, 2022 at
10:59 AM Dennis Glatting <<a href="mailto:dg@pki2.com"
moz-do-not-send="true" class="moz-txt-link-freetext">dg@pki2.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">On Tue,
2022-01-18 at 12:29 -0800, Michael Thomas wrote:<br>
> <br>
> I really don't know anything about it. It seems really
late to be<br>
> having <br>
> this fight now, right?<br>
> <br>
<br>
I worked in aviation as a technologist. Aviation is
resistant to change.<br>
Any change. When you fly older aircraft, be aware that the
software is<br>
old. Very old. As in some of the vendors long ago stopped
supporting the<br>
software kind of old, assuming the vendors still exist. <br>
<br>
Aviation didn't wake up one day with the sudden appearance
of 5G. They<br>
knew it was comming. They, aviation themselves, are heavily
involved in<br>
standards. Aviation had plenty of time to test, correct, and
protest.<br>
<br>
What aviation now wants is a 5G exclusion zone around
airports, or what<br>
I sarcastically call "a technology exclusion zone," which
tends to be<br>
businesses and homes. What is aviation going to do when 6G
comes along?<br>
A new WiFi standard is implemented? Any other unforeseen
future<br>
wired/wireless technologies? Or perhaps cell phones should
go back to<br>
Morse Code for aviation's sake?<br>
<br>
🤷♂️️<br>
<br>
<br>
-- <br>
Dennis Glatting<br>
Numbers Skeptic<br>
</blockquote>
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