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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.
Max Trescott photo 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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At United Airlines, Does Making Money Trump Safety?
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At United Airlines, does making money trump safety?
A recent Aviation Week article quotes United CEO Jeff Smisek saying, “We’re going to run the airline for profit maximization …” That made me wonder a bit.
Then I noticed last week’s Wall Street Journal story in which the airline strongly chastised its pilots for cockpit safety issues the company warned could lead to an accident. United’s tone throughout the story made it appear the company had just uncovered a scorpion’s den of safety violations created by a bunch of rogue pilots who cared little about the safety of their millions of passengers.
But there’s another side to the story and calling it eye opening is a bit of an understatement.
After reading the WSJ story broken by Andy Pasztor, I began receiving a series of intriguing documents from some United pilots that again made we wonder if United is too focused on money, so much so in fact that the company might be avoiding responsibility for financially-focused policies that appear to already be undermining safety at the airline. (Note: this story was edited after it posted to correct an error in my referencing the NYTimes, when the story should have mentioned The Wall Street Journal)
While some readers might assume the information I received was simply a reaction to the company’s indictment of its pilots, it now actually seems to be the other way around. Among what I received, was a letter from a pilot member of Local 12, the Chicago council of the Air Line Pilot Association penned by their local safety officials. They were considerably more blunt about the problem at the airline. “[At United] economics trump safety,” they said. Pilots told me that their training at United, once the envy of the aviation industry, has deteriorated to become more of an industry joke. (more…)
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How Passengers Helped Mess Up Frequent Flyer Programs
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RSS FeedHow Passengers Helped Mess Up Frequent Flyer Programs
Dear Reader / Listeners – You now have the option to listen to The Aviation Minute podcast or just read the script of the show below. If you receive Jetwhine via e-mail, you can click here to listen as well.
If you’re not yet a subscriber to The Aviation Minute, Click Here to sign up … it’s free.
If you missed last week’s episode of The Airplane Geeks Show, you also missed the discussion Brian Coleman our assistant producer started about frequent flyer programs. He began by mentioning the changes Southwest Airlines recently made to its Rapid Reward system. OK … bias alert — I’m a long time Southwest customer, a fact that has nothing to do with the photo I have in my office of the airline’s founder Herb Kelleher and I having a glass of Wild Turkey when I was lucky enough to meet him many years back.
Anyway, everyone seemed so concerned about Rapid Rewards. The changes mean a free flight costs more than it used to. Hmmm … A free flight costs more … now there’s a contradiction for you. My only comment though was so what? The fact that Southwest took this long to tweak their program to better reflect the price of the ticket was the real surprise to me.
Even though I have to drive crosstown to Midway to connect with Southwest, I make the trip often, but not because of the free tickets. I just like Southwest’s service. Free tickets are just gravy. And I don’t fly Business Select either. I’m in back with everybody else.
But of course Brian couldn’t stop himself from talking about frequent flyer points. A couple of days later, he just had to share a post from our buddy Brett Snyder over at the Cranky Flier … that’s crankyflier.com BTW. Brett makes airline economics look pretty easy as you’ll see if you read his Feb. 19th story about Southwest. I don’t disagree with what Brett said at all, but the changes don’t mean much to me. So maybe I’m in a minority even when the guy who cuts my hair started asking me for advice the other day on how best to travel using frequent flier points … Uggggh! (more…)
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The FAA Invites Comments on Drone NPRM
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Over the past quarter century I’ve read most of the Notices of Proposed Rulemaking that would affect general aviation. What separates the just released NPRM that introduces Part 107, Operation and Certification of Small Unmanned Aircraft Systems, from all the others is not its subject, small unmanned aircraft systems, but a phrase: “The FAA invites comments.”
This phrase concludes almost every topic discussed in the drone NPRM. And when it doesn’t, “the FAA welcomes comments,” often with supporting documentation or data to support the commenter’s point. Altogether, they are like addicting chocolate chips in the yummy common-sense cookie dough of proposed regulations. The cynic in me asks, What is the government up to?
It should surprise no one that drones have, are, and will divide those involved in all aspects of aviation. I imagine the same was true among those in the FAA who met to hash out the specifics of this NPRM. Certainly, some were for drones and others were against integrating them in the National Airspace System.
In the end, it seems that they settled on requirements that didn’t stifle innovation, important to any infant industry, while establishing level of safety equivalent to the risk presented. And because the federal rulemaking process requires them to address the comments presented, we the people who comment will ultimately decide what the Part 107 final rule looks like. And it might not turn out like some might expect.