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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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Learning From the Decisions of Others
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Aviation safety, when you get right down to it, is an endless round of risk assessment what ifs. There is much to learn when what ifs become real life right now. If you survive, that is. Another way to learn is from the decisions made by others. Call it aviation erudition, extensive knowledge acquired from books or other written materials, such as Callback, the monthly publication from NASA’s Aviation Safety Reporting System.
This fine and free publication is must reading for any safety conscious pilot, and the issues I most look forward to, because they keep my head in the risk assessment arena, are those like April 2023, whose headline poses this question: What Would You Have Done? Because no pilot can make (let alone survive) every manner of aeronautical mistake in every category and class of flying machine, Page 1 of this issue presents the essential facts from the spectrum of ASRS Safety reports, and then poses the headline question. Page 2 presents The Rest of the Story.
This issue presented three situations.
Dominoes in The Pattern set up a potential midair between a CFI doing pattern work with a student with an inbound flight aiming for the same runway and another plane departing on a crossing runway at a nontowered airfield.
Unmarked in Plain Sight recounts the situation where a UAS operator and commercial pilot who was training a new pilot for infrastructure inspections realized, after switching drones and taking off, that he’d forgotten to affix the FAA registration sticker to the airframe. The scenarios that introduce unfamiliar situations are risk assessment gold because they challenge you to logically distill the fundamental wort of your aviation knowledge.
The final scenario, The Wind in the Windows, presents a situation many general aviation pilots have faced, but when was the last time you heard a Boeing 767 captain writing about a cockpit window popping open at 110 knots on the takeoff roll. Not having a clue, I immediately scrolled the page for the rest of the story. Not wanting to spoil the lesson, you can read them all at the link above. Enjoy, and happy flying safely. — Scott Spangler, Editor
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Commercial Pilots and the CFI Crossroads
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Talking last week to a 30-something professional pilot about his journey to a Gulfstream cockpit, he brought my interrogation to a dead silent stop with his answer to one question. After he summarized the chronology of his pilot certificates and ratings, I asked about the one he didn’t mention, the CFI—certificated flight instructor.
Like a lot of younger pilots striving for paying careers, he said, given the pilot job market, the CFI is a crossroads between spending a lot more money and time to earn the most demanding and challenging pilot certification in all of aviation, and getting a job that pays money. The answer is clear, he said, especially if a new commercial pilot also has a multiengine rating.
In three decades of interrogating professional pilots, the only ones who typically didn’t have a CFI earned their wings in the military (but many of them earned their CFI after they transitioned to their airline life). I’m sure there are some professional pilots who clawed their way up the civilian ladder who skipped the CFI rung, but I don’t remember ever talking to any of them.
Talking to one who might be an exception does not define a new rule in today’s training and professional pilot markets without some quantification. Absent the resources to survey today’s population of pro pilots, I turned to the FAA’s U.S. Civil Airman Statistics. Among the many tables in each year’s spreadsheet is one that gives a 10-year look at initial certificates issued.
Here is the table of the initial issuance of commercial and flight instructor certificates earned in 2013 to 2022. (I added the yellow to remind me of the pandemic disruption.) At first glance, the numbers don’t seem to support that the CFI crossroads is trending no CFI. And without a doubt, the pilot job market is much better now than it was a decade ago.
What’s interesting is that the number of commercial certificates peaked in 2020, the year the CDC shutdown the nation on March 15, a shutdown that continued through the end of April 2020. The initial CFI issuances peaked last year. Equally interesting is the shared trend of increasing totals of issued certificates, which only took a short step back during the shutdown.
The low numbers in the early teens are surely the nagging consequences of the Great Recession of 2007-2008. But an equally important trend is the difference between those issued a commercial and a CFI. It was roughly 50/50 in 2017, the year my subject graduated from college. Naturally, this isn’t the best measure of a pilot’s crossroads’ decision, but it’s the best one readily available.
The number of commercial pilots who didn’t earn a CFI trended higher until the pandemic, so maybe there’s something to my pro pilot’s crossroads observation. Certainly, this topic might make an excellent survey and statistics project for someone now enrolled in an aviation degree program. What decision did you make at the CFI crossroads. — Scott Spangler, Editor