Fiber cut by NJ Transit crew triggers Northeast-wide flight ground stops
A backup cable severed during New Jersey construction knocked out a Philadelphia air traffic control facility, grounding flights across the Northeast for hours.
Part of a larger narrative
US-UK Air Traffic Meltdown
- Fiber cut by NJ Transit crew triggers Northeast-wide flight ground stopsyou are here
- NATS air traffic glitch cancels 2,000+ UK flights, boss given a week to explain
What to know
- A New Jersey construction crew building the Delco Lead rail project severed a fiber-optic cable, which turned out to be the backup circuit for a Philadelphia air traffic control facility whose primary circuit had already failed.
- The failure grounded and delayed flights at Newark, Teterboro, Philadelphia, JFK, LaGuardia and Boston, canceling hundreds of flights including over 600 at Newark, on the eve of the UN General Assembly in New York.
- Officials initially blamed Amtrak; NJ Transit later confirmed it was its own crew, working several feet from marked cable locations, that caused the damage.
- Operations resumed within about 24 hours after Verizon repaired the cable, but the incident renewed scrutiny of the FAA's aging, seemingly under-redundant infrastructure.
The dispute Whether the outage reflects deep-seated incompetence/negligence in FAA infrastructure design versus simply an unremarkable, industry-common construction accident. · positions read across 40 posts and comments
This reveals genuine incompetence: a backup line's failure should never go undetected until the moment of failover.
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“Pretty grim that a life critical system wasn't designed to report that the backup fibre was unserviceable until they attempted to switch over to it. I wonder how long it was down? Days, weeks, months?”
cube00 · Hacker News ↗
Construction crews accidentally cutting buried fiber is a common, almost folkloric occurrence in the industry.
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“if you're ever going into the wilderness take a 1ft length of fiber optic cable with you. If you get lost bury it and a back hoe operator will appear and sever it within an hour.”
chasd00 · Hacker News ↗
The timing next to a new AI air traffic control rollout looks suspicious.
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“On the same day they interduce AI flight controllers? Press X for doubt.”
wnevets · Hacker News ↗
“As quickly as possible”
Verizon, Telecom company, cable owner · BBC ↗ · Sep 20
Sean Duffy US Transportation Secretary
Bryan Bedford FAA AdministratorNJ Transit New Jersey rail operatorVerizon Owner of the damaged cableDouglas Tewnion Stranded traveler
How it unfolded 8 developments, newest first · click a bar or a number to jump articlesvideospostscomments
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New York airport operations fully resume with residual delays
By Tuesday, New York City-area airports were operating again with some remaining delays and cancellations, as officials confirmed the damaged communications lines at the Philadelphia air traffic control facility had been repaired.
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5 outlets first by PBS NewsHour, 1d ago · also Los Angeles Times, CP24, CTV News, Fox Business · read ↗
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I remember a story from an acquaintance working in construction. In one case they had to dug up right where a fiber optic ran, so they had cleared it with its operator and waited for their go-ahead. And waited. And waited, until the boss said something to the effect of 'start digging, we have a schedule to keep'...
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Scale of disruption tallied: hundreds of flights, 600+ at Newark
Reporting confirmed the repaired Philadelphia facility's damaged communications lines had caused hundreds of cancellations across the Northeast, including more than 600 flights into and out of Newark Liberty International Airport, as the outage hit every major New York City-area airport.
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first by CNN, 1d ago · also Denver Post, Mercury News, Philadelphia Inquirer, Toronto Star, The Hill, NY Post
3 more headlines
- New York airport operations resume after disruptions across US Northeast due to technical problems Denver Post · 1d ago
- Airports resume operations after massive disruptions in Northeast The Hill · 1d ago
- NYC-area airport operations resume after hundreds of flights canceled across Northeast NY Post · 1d ago
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first by Le Monde EN, 2d ago · also CBS News
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what a magnificent fuckup! > workers accidentally cut a telecom line in New Jersey used by the FAA. This forced a halt to incoming flights at major airports, on a day when 130 world leaders & dozens of ministers were arriving in New York for the annual high-level meeting of the United Nations General Assembly. > The FAA stopped arrivals at all…
2 more of the top 3 · 3 posts in this stretch
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The US alone has over 44,000 flights per day. Russia has 3560 on average. There is over 10X the air traffic in the USA alone. And idk what sources you are reading, but it's been well documented that capacity is WAY down in Russia and their entire system has constant problems. What's going on with Russian aviation?
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# WeAreNotSafeUnderTrump Equipment outages grounded flights into Philly airport and caused long delays Flights into Philadelphia International Airport were grounded for much of the day Monday due to a stop instituted by the Federal Aviation Administration that impacted hundreds of flights in the Northeast in the wake of equipment outages…
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Flight operations resume at Northeast airports as lines repaired
Flights resumed at five major Northeast airports Monday evening after telecom lines were repaired, following hours of cancellations and delays; Verizon and officials said restoration work continued through the night.
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3 outlets first by Investing.com News, 2d ago · also Philadelphia Inquirer, Times of India · read ↗
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first by NBC News, 2d ago
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Flight operations resume at Northeast airports after telecom lines repaired https://www. upi.com/Top_News/US/2026/09/21 /flights-canceled-fiber-optic-cable-cut-nj-philadelphia-ny/2631790021009/ Flights at five major airports in the Northeast have resumed Monday evening, hours after equipment outages caused many cancelations and delays. # news #…
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Made an edit to previous comment, it may just be an assistance tool but I don't know enough about its use, purpose or how involved it will be in decision making but it was at JFK today,
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https://www. europesays.com/us/1077882/ Flights at Newark, JFK, LaGuardia airports resume following equipment outage, FAA says # America # JohnFKennedyInternationalAirport # LaguardiaAirport # NewYork # NewYorkCity # NewarkLibertyInternationalAirport # NewYork # NewYorkCity # NY # NYC # SeanDuffy # UnitedStates # UnitedStatesOfAmerica #…
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NJ Transit, not Amtrak, confirms its crew severed the cable
Transportation Secretary Sean Duffy initially blamed Amtrak, but NJ Transit issued a statement saying its own crew accidentally severed a fiber-optic cable while working on the Delco Lead project between New Brunswick and North Brunswick, several feet from marked cable indicators.
“At approximately 9:45 a.m. today, a construction crew working on the Delco Lead project between New Brunswick and North Brunswick accidentally severed a fiber-optic cable while working at the site.”
— NJ Transit -
Flyers across the United States are facing massive disruptions to their travel plans on Monday after equipment outages stopped flights at Newark Liberty International Airport in New Jersey and Philadelphia International Airport in Pennsylvania, with no estimated time for resuming
2 more of the top 3 · 11 posts in this stretch
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back in the day, i worked for Energis (#3 wholesale telco in the UK) … we had about 2.2m active subscribers and ran a fibre backbone.one day the backbone (E1 bidirectional ring iirc) was broken north of london … my boss drove out to find that travellers had entered the field, opened the inspection cover in the ground, stood a pole for their…
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CBS reports that the fiber cut occurred today. NJ Transit (not Amtrak) released a statement that "at ~9:45 a.m. today, a construction crew working on the Delco Lead project between New Brunswick and North Brunswick accidentally severed a fiber-optic cable while working at the site. Preliminary information indicates the crew was operating approx 10…
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Officials trace outage to a backup fiber cut discovered mid-failover
A primary circuit connecting airports failed, leading to discovery that the backup fiber circuit had also been damaged by a New Jersey construction crew; officials said the roughly 600-foot cut would take over 13 hours to fix.
“led to the discovery of a backup fiber circuit which had been damaged by construction crews in New Jersey. The 600 ft cut will take 13+ hours to fix.”
— AkaSci -
first by Globe and Mail, 2d ago · also NYT, Channel News Asia, Indian Express, Reuters, The Hindu, Al Jazeera +1
5 more headlines
- Technical Problems Ground Flights at Major East Coast Airports NYT · 2d ago
- US halts flights at busy East Coast airports, says fiber line cut at construction site Channel News Asia · 2d ago
- U.S. halts flights at busy East Coast airports, says fiber line cut at construction site The Hindu · 2d ago
- FAA halts flights to major US East Coast airports amid outage Al Jazeera · 2d ago
- US halts flights at busy East Coast airports, says fibre line cut at construction site Straits Times · 2d ago
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Massive air-traffic disruption in NY area airports, bleeding into other airports. Cause: A primary circuit connecting airports failed, which "led to the discovery of a backup fiber circuit which had been damaged by construction crews in New Jersey." The 600 ft cut will take 13+ hours to fix. We all periodically test backup systems, right?…
2 more of the top 3 · 7 posts in this stretch
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Not to be conspiratorial, but about an hour ago I saw this in The Economist: "Russia’s grey-zone attacks on Europe are growing more brazen"[QUOTE:]Russia has been staging covert operations and deniable provocations against European countries for many years. Since its full-scale invasion of Ukraine began in 2022 they have increased. These have…
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“At least five airports along the East Coast, including four that serve the New York region, experienced significant ground stops on Monday after a radio communications system in Philadelphia and its backup failed, triggering flight delays across one of the country’s most congested corridors.” Technical Problems Ground Flig...
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Disruption spreads to JFK, LaGuardia and Boston
A ground stop at Philadelphia caused by construction damage delayed flights further, hitting New York's JFK and LaGuardia airports as well as Boston.
“BREAKING: Ground stop at Philadelphia Airport due to construction damage delays flights at JFK, LaGuardia and Newark.”
— ms.now (Bluesky) -
first by bbc.com, 2d ago · also Times of India, BBC
1 more headline
- Flights grounded at major US airports after construction workers cut backup cable Times of India · 2d ago
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first by Mastodon, 1d ago · also BBC
1 more headline
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The FAA has grounded flights at New York, Boston, New Jersey, and Philadelphia airports after Trump's Department of Transportation accidentally cut a fiber line during Air Traffic Control system renovations.
2 more of the top 3 · 12 posts in this stretch
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BREAKING: Ground stop at Philadelphia Airport due to construction damage delays flights at JFK, LaGuardia and Newark. Katy Tur reports.
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FAA orders ground stops at major NYC area airports because of a failed circuit connecting tri-state hubs. https://www. nbcnewyork.com/new-jersey/newa rk-airport-ground-stop-equipment-issues/6550060/
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FAA extends ground stops to Newark, Teterboro and Philadelphia
The FAA ordered ground stops at Newark Liberty International, Teterboro Airport, and Philadelphia International Airport because of the equipment outage.
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first by CBS News, 2d ago · also Hindustan Times, NBC News, Investing.com News, CNBC
5 more headlines
- Newark and Philadelphia airports ground stop update: FAA equipment outage delays flights, causes disruptions Hindustan Times · 2d ago
- Flights delayed out of Newark and Philadelphia after FAA orders ground stops NBC News · 2d ago
- FAA halts flights to Philadelphia and Newark airports Investing.com News · 2d ago
- FAA halts flights to Newark, Philadelphia, New York because of equipment problem Mastodon · 2d ago
- FAA halts flights to Newark and Philadelphia because of equipment issue CNBC · 2d ago
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first by CNN, 2d ago · also ZeroHedge
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FAA orders ground stop at Newark amid Philadelphia equipment issue
A full ground stop was ordered at Newark Liberty International Airport as equipment problems emerged at a Philadelphia air traffic control facility.
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first by NJ.com, 2d ago · also Philadelphia Inquirer
1 more headline
- FAA grounds flights heading to Philly airport due to equipment issues Philadelphia Inquirer · 2d ago
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first by Mastodon, 21h ago
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Also covered reported alongside — the timeline has no entry for these yet
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5 outlets Flights disrupted across the U.S. Northeast due to technical problems at a key air traffic centre
first by CTV News, 2d ago · also Chicago Tribune, Philadelphia Inquirer, WTOP News, PBS NewsHour
3 more headlines
- Flights are disrupted across US Northeast because of technical problems at a key air traffic center Chicago Tribune · 2d ago
- Flights are disrupted across the US Northeast due to technical problems at a key air traffic center Philadelphia Inquirer · 2d ago
- Technical problems at a key air traffic center disrupt flights across Northeast PBS NewsHour · 2d ago
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3 outlets Flights are disrupted across Northeast because of technical problems at a key air traffic center
first by Orlando Sentinel, 2d ago · also Mercury News, Baltimore Sun
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2 outlets Flights disrupted across the US Northeast due to technical problems at a key air traffic center
first by Philadelphia Inquirer, 2d ago · also KSTP-TV
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first by The Hill, 2d ago · also Seeking Alpha
1 more headline
- Verizon says contractor cut fiber cable amid Northeast flight disruptions Seeking Alpha · 2d ago
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first by CBS News, 2d ago · also Gothamist
1 more headline
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first by HN Best, 2d ago · also HN Frontpage
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first by NewsMax.com, 2d ago · also Investing.com News
2 more headlines
- FAA halts some US east coast flights due to communication issues Investing.com News · 2d ago
- FAA halts flights at major East Coast airports after telecom failure Investing.com News · 2d ago
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first by UPI, 2d ago
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and 12 smaller pieces
What people are saying 9 voices from 2 sites · best of 40 · verbatim
- How long had the backup fiber actually been damaged before the primary circuit failed and exposed it?
- Wasn't the internet/ATC network supposed to be self-healing with redundant paths?
- Who placed the cable location markings that NJ Transit's crew worked near, and were they accurate?
- Sep 21
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reminds me of https://www.cbc.ca/news/canada/saskatchewan/stranded-man-cut...>A man stranded in the bush in northern Saskatchewan was rescued last week after chopping down four power poles — knocking out electricity to surrounding communities. [...]>But he had an axe and he knew SaskPower would have to check the downed line, so he went to work.
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It happens. There use to be a joke during the first big DC build out phase that went like if you're ever going into the wilderness take a 1ft length of fiber optic cable with you. If you get lost bury it and a back hoe operator will appear and sever it within an hour. You can get a ride back with them.
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Finding out your backup fiber has been cut, aparently some time ago, only when you try to use it as the backup isn’t an issue of “aging infrastructure.” It’s an issue of letting completely incompetent people run your tech.
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At least five airports along the East Coast, including four that serve the New York region, experienced significant ground stops on Monday after a radio communications system in Philadelphia and its backup failed, triggering flight delays across one of the country’s most congested corridors. https://www. nytimes.com/2026/09/21/us/east…
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2/2 A much better, and more believable, explanation is here... "What we know about the FAA outage disrupting thousands of flights across the Northeast" https://www. businessinsider.com/faa-outage -newark-northeast-airports-flight-delays-cancellations-2026-9
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Building multiple diverse paths and monitoring for fiber cuts is not hard. Having 2 fiber paths is insufficient for even only moderately important workloads at a tech company. Overlapping fiber cuts happen. For something with significant economic and safety impact this is just crazy.Sometimes the level of incompetence / lack of care in…
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> When it went to flip into the backup, we discovered that the backup fiber had a breakPretty grim that a life critical system wasn't designed to report that the backup fibre was unserviceable until they attempted to switch over to it.I wonder how long it was down? Days, weeks, months?
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I don't quite understand this sort of thing happening. Wasn't the whole point of the internet to be a self-healing network where we route around severed cables, etc?Or is it that these ATC networks are their own air-gapped network with less redundancy? That just doesn't add up. Or maybe there was only one line going to the ATC, with no multiple…
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Flights are grounded through at least 1:45 p.m. At Newark, 179 flights have been canceled and 224 are delayed as of 1:10 p.m. due to a ground stop caused by an equipment failure. https://www. nj.com/news/2026/09/newark-hit -again-as-equipment-failure-halts-flights-at-3-airports-monday.html