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Making the Brazilian ATR-72 Spin
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Note: This story was corrected on August 10th at 10:23 am, thanks to the help of a sharp-eyed reader.
Making an ATR-72 Spin
I wasn’t in Brazil on Friday afternoon, but I saw the post on Twitter or X (or whatever you call it) showing a Brazil ATR-72, Voepass Airlines flight 2283, rotating in a spin as it plunged to the ground near Sao Paulo from its 17,000-foot cruising altitude. All 61 people aboard perished in the ensuing crash and fire. A timeline from FlightRadar 24 indicates that the fall only lasted about a minute, so the aircraft was clearly out of control. Industry research shows Loss of Control in Flight (LOCI) continues to be responsible for more fatalities worldwide than any other kind of aircraft accident.
The big question is why the crew lost control of this airplane. The ADS-B data from FlightRadar 24 does offer a couple of possible clues. The ATR’s speed declined during the descent rather than increased, which means the aircraft’s wing was probably stalled. The ATR’s airfoil had exceeded its critical angle of attack and lacked sufficient lift to remain airborne. Add to this the rotation observed, and the only answer is a spin.
Can a Large Airplane Spin?
The simple answer is yes. If you induce rotation to almost any aircraft while the wing is stalled, it can spin, even an aircraft as large as the ATR-72. By the way, the largest of the ATR models, the 600, weighs nearly 51,000 pounds.
Of course, investigators will ask why the ATR’s wing was stalled. It could have been related to a failed engine or ice on the wings or tailplane. (more…)
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How the FAA Let Remote Tower Technology Slip Right Through Its Fingers
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In June 2023, the FAA published a 167-page document outlining the agency’s desire to replace dozens of 40-year-old airport control towers with new environmentally friendly brick-and-mortar structures. These towers are, of course, where hundreds of air traffic controllers ply their trade … ensuring the aircraft within their local airspace are safely separated from each other during landing and takeoff.
The FAA’s report was part of President Biden’s Infrastructure Investment and Jobs Act enacted on November 15, 2021. That bill set aside a whopping $25 billion spread across five years to cover the cost of replacing those aging towers. The agency said it considered a number of alternatives about how to spend that $5 billion each year, rather than on brick and mortar buildings.
One alternative addressed only briefly before rejecting it was a relatively new concept called a Remote Tower, originally created by Saab in Europe in partnership with the Virginia-based VSATSLab Inc. The European technology giant has been successfully running Remote Towers in place of the traditional buildings in Europe for almost 10 years. One of Saab’s more well-known Remote Tower sites is at London City Airport. London also plans to create a virtual backup ATC facility at London Heathrow, the busiest airport in Europe.
A remote tower and its associated technology replace the traditional 60-70 foot glass domed control tower building you might see at your local airport, but it doesn’t eliminate any human air traffic controllers or their roles in keeping aircraft separated.
Inside a Remote Tower Operation
In place of a normal control tower building, the airport erects a small steel tower or even an 8-inch diameter pole perhaps 20-40 feet high, similar to a radio or cell phone tower. Dozens of high-definition cameras are attached to the new Remote Tower’s structure, each aimed at an arrival or departure path, as well as various ramps around the airport.
Using HD cameras, controllers can zoom in on any given point within the camera’s range, say an aircraft on final approach. The only way to accomplish that in a control tower today is if the controller picks up a pair of binoculars. The HD cameras also offer infrared capabilities to allow for better-than-human visuals, especially during bad weather or at night.
The next step in constructing a remote tower is locating the control room where the video feeds will terminate. Instead of the round glass room perched atop a standard control tower, imagine a semi-circular room located at ground level. Inside that room, the walls are lined with 14, 55-inch high-definition video screens hung next to each other with the wider portion of the screen running top to bottom.
After connecting the video feeds, the compression technology manages to consolidate 360 degrees of viewing area into a 220-degree spread across the video screens. That creates essentially the same view of the entire airport that a controller would normally see out the windows of the tower cab without the need to move their head more than 220 degrees. Another Remote Tower benefit is that each aircraft within visual range can be tagged with that aircraft’s tail number, just as it might if the controller were looking at a radar screen. (more…)
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Understanding Air France 447’s Author Bill Palmer Talks to Jetwhine
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RSS FeedRegular Jetwhine readers might just remember a number of lively debates on this blog about what happened to Air France 447 over the South Atlantic in June 2009. A few of those conversations reached heated proportions too, with opinions … some from pilots, some not. One commentor here at Jetwhine always managed to sound informed yet cool through all the chatter. That man was Bill Palmer, an Airbus A330 captain and instructor pilot for one of the major airlines.
We spent some time recently talking to Palmer about his new book, “Understanding Air France 447,” a volume focused on helping readers better understand what really happened that night, as well as to help separate the facts from the rumors and innuendos. One rumor claimed the tail fell of the A330 — false. Another that the “Stall, Stall,” audio warning message played in the cockpit for nearly a solid minute without anyone in the cockpit even mentioning the word stall — true.
The book is chock full of detailed explanations about what happened on board the cockpit of this A330 that stormy June morning, as well as the inner workings of the BEA investigation of the crash. This book offers valuable lessons for any pilot, whether they’re airline or corporate pilots, or Piper and Cessna drivers. You’ll find Palmer’s book in paperback and e-book formats at Amazon.com and Barnes and Noble.com, as well in eBook form at the iTunes store.
Grab a cup of coffee and for the next 10 minutes or so listen to Bill Palmer explain what happened aboard Air France 447 in June 2009 and exactly what this crash means for the rest of the aviation industry.
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New Rule ‘Advances’ Pilot Training Back to the Fundamentals of Flight
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Responding to the tragedy of Colgan Flight 3407, the FAA has issued a final rule that “is a significant advancement for aviation safety and U.S. pilot training,” says Transportation Secretary Anthony Foxx in the FAA news release.
To quote the FAA release, the new rules requires these stick-and-rudder skills: “ground and flight training that enables pilots to prevent and recover from aircraft stalls and upsets” and “expanded crosswind training, including training for wind gusts.”
The other requirements all have to do with paperwork, such as “tracking remedial training” and “more effective pilot monitoring,” which is important in assessing blame after unfortunate pilots have a problem related to their lack of current stick-and-rudder skills.
Can I really be so old that the skills my instructor reinforced with practice on almost every lesson—recovering from stalls and unusual attitudes—are now considered advanced training? And landing in a crosswind, at least at most of the airports I called home, was not a special skill. When I was flying in the Kansas City area, landing without a crosswind was the challenge.
Perhaps I am. I learned to fly in the last decade of aviation’s analog era. Back in the 1970s, headsets were the big thing. That was also when the pilot population started its decline, so industry started easing the requirements to make private pilot training less intimidating. Who remembers the heated debates on the need for spin training?
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LAX Shooting is a Wakeup Call
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Guns and airports don’t mix well … unless those weapons are being carried by law enforcement officers.
Period.
As the aviation industry evolves from an era of proactive problem solving to a search for more predictive solutions based on the tons of data we’re gathering about the industry, we should have seen something like last week’s shooting at Los Angeles International Airport coming.
The data was there. It’s just that no one analyzed it for what it really was … a warning.
Each week the Transportation Security Administration (TSA) publishes lists and photos of the weapons their agents confiscate at airport security checkpoints. For all their customer-service foibles, the TSA is at it’s most admirable at these efforts.
In the week ending October 25 — just days before the shooting — the TSA confiscated 39 handguns at major airports like Houston, Jacksonville and Charlotte. Most of them had a round in the chamber too. Look back over the past year alone and you’ll see the weekly numbers were pretty consistent. Hundreds of weapons then have been brought to airports each year. Why?
The reasons the TSA receives for why these gun-toting folks bring their weapons are often simply bizarre. Responses ideas like, “I forgot I had that gun in my computer bag/purse,” or “Of course it’s loaded. What good is it if it’s not loaded.”
Twelve years after 9/11 people trying to jump on an airliner remember to remove their toothpaste and water bottles from their carry ons, but not their loaded 38s. (more…)