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FAA NOTAM System Outage

fly.faa.gov

91–100 of 230 posts

Re: FAA NOTAM System Outage

#91
post #47

Why do all aviation IT systems feel like they are so fragile? It feels like not a single month can pass these days without some "Airline X has major outage and ruins tons of people's days!" story on the news. What is the tech behind these frail systems?

The software is tied to a dependency chain of real people (passengers, crew, etc), real equipment, and lots of constraints. So problems have a downstream effect that's more pronounced and visible than many other spaces.

Re: FAA NOTAM System Outage

#92
post #49

Earlier quoted context omitted.

https://lite.cnn.com/en It's the best way to get the news. No filler, no adds and it works on a 2g mobile.

Not sure CNN is the "best" way to get the news. Try this: https://en.wikinews.org/wiki/Main_Page No ads, no adds, no filler, no filters. Make the news objective again. Repeal Smith-Mundt. https://www.congress.gov/bill/112th-congress/house-bill/5736

I went to Wikinews (now) and there isn't a single mention about all US flights being grounded. https://archive.is/rtugM

Re: FAA NOTAM System Outage

#94
post #43
post #38

There's a ground stop for all flights now. GROUND STOP ALL FLIGHTS / ALL DESTINATIONS EXCLUDES MILITARY AC AND MEDEVAC FLIGHTS DESTINATION AIRPORT; ALL FACILITIES INCLUDED: ALL GROUND STOP PERIOD: UNTIL 1430Z REASON: EQUIPMENT OUTAGE REMARKS: US NOTAMS SYSTEM DOWN

This might be a silly question, but is that a NOTAM saying that NOTAM system is down? How does it get out?

Reminds me of that screenshot of a windows popup unable to display an error.

Re: FAA NOTAM System Outage

#95

The NOTAM system is embarrassing. This just tops it off. Actually, our whole ATC system and the way the FAA operates is embarrassing. It all works kind of like waste management in NYC. If they were to add new tech and efficiency, fewer people would have jobs, so we keep doing it the old way to the detriment of everyone else.

What embarrasses you about it, esp compared with more modern systems? This seems like the kind of critical infrastructure whose uptime requirements can make upgrading challenging once in place.

Others have said it better. If you google 'notams are broken', numerous results will show up explaining various problems with the NOTAM system.

Edit: Here's a good one - https://fixingnotams.org/ending-notam-nonsense-in-the-digita...

A general inefficiency example using two airpots I often have in mind: IAH and JFK. In IAH, traffic is spaced out in cruise well before the arrival begins, where they're burning much less fuel at high altitude. They're then instructed to descend via the full STAR (standard terminal arrival), including the transition to the approach for the runway in use. This looks like a hundreds mile long line of planes all following the same path to the same runway. The only further instruction necessary from ATC is speed adjustment, and allows for an almost continuous descent to the runway provided there's no weather in the way.

At JFK, the spacing occurs much later and, even though the airport has some similar arrivals (though none quite as thorough), they instruct every altitude change and speed adjustment for every aircraft individually, along with vectoring them to the approach for the runway in use. It results in an incredibly busy radio environment and numerous inputs from pilots flying planes capable of simply following a STAR and transition, like in IAH (or ORD, SFO, LAX, etc). There's also much more time spent at low altitude burning more fuel. It reminds me of everything else in NYC, which seems to be inefficient on purpose (NYPD, MTA, DSNY, etc.).

JFK and IAH have a similar number of aircraft movements. Yes, NYC has busier airspace with numerous airports, however, I don't see how this prevents the design and implementation of more modern procedures. Flying around at 4000 feet in an airliner getting numerous vectors just seems ridiculous compared to what I experience elsewhere.

Re: FAA NOTAM System Outage

#96
post #70

Q: Is there anything like a systems architecture diagram for how NOTAM works? I'm curious about which parts might have failed and what the moving pieces are.

Some here, mixed in with other info:

https://www.faa.gov/air_traffic/technology/swim/users_forum/...

https://www.faa.gov/sites/faa.gov/files/2021-10/NOTAM%20Mod%...

Re: FAA NOTAM System Outage

#97
https://twitter.com/FAANews/status/1613171400801394688

" Normal air traffic operations are resuming gradually across the U.S. following an overnight outage to the Notice to Air Missions system that provides safety info to flight crews. The ground stop has been lifted...We continue to look into the cause of the initial problem"

Re: FAA NOTAM System Outage

#98
post #56

Fun stuff about NOTAMs: https://fixingnotams.org/wp-content/uploads/2019/11/Field-Gu...

Fun but deadly. They’re not wrong about the absolute avalanche of irrelevant data that will be used to show you “you should have known” - hence the proliferation of “interpretation” services.

Re: FAA NOTAM System Outage

#99

For anyone looking for previous FAA outages: In 2014, an U-2 plane’s flight plan crashed LAX’s ERAM system because the system ran out of memory. https://www.oig.dot.gov/sites/default/files/FAA%20Actions%20...

Why do secretive spy planes need to file flight plans?

Re: FAA NOTAM System Outage

#100
post #56

Fun stuff about NOTAMs: https://fixingnotams.org/wp-content/uploads/2019/11/Field-Gu...

"There are three parts to the problem: the system, the format, and the content. The system is actually quite amazing. The AFTN network connects every country in the world, and Notam information, once added, is immediately available to every user. Coupled with the internet, delivery is immediate.

The format is, at best, forgivable. It’s pretty awful. It’s a trip back in time to when Notams were introduced. You might think that was the 1960’s, or the 50’s. In fact, it’s 1924, when 5-bit ITA2 was introduced. The world shifted to ASCII in 1963, bring ing the Upper and Lower case format that every QWERTY key board uses today, but we didn’t follow – nope, we’ll stick with our 1924 format, thank you."

https://web.archive.org/web/20230104130153/https://www.faa.g...

"The FAA is changing the format for Notice to Air Missions (NOTAM) to align with international standards. The transition to the new format will ensure U.S. NOTAMs are compliant with standards set by the International Civil Aviation Organization (ICAO) and promote further global harmonization among neighboring Air Navigation Service Providers (ANSPs)."

ICAO NOTAM format

https://vat-air.dk/files/ICAO%20NOTAM%20format.pdf

Example! (decoder ring not included)

"Q) EGTT/QMRXX/IV/NBO/A/000/999/5129N00028W005"

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