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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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FAA Solves ATC Staffing Crisis
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It only took the agency a couple of years – actually about 10 I believe – but FAA has finally taken action on the problem of too many airplanes and two few air traffic controllers to keep them all apart. And before you ask, yes, the downturn in the economy has given the agency a shred of breathing space as traffic numbers have dropped off the past few months. But just like the quiet after 9/11, this latest respite will never carry the air traffic control system through for long. The new FAA computerized Next Gen ATC system is also at least a decade away from being of any use.
Clearly the agency was in a spot, especially since eternally-souring labor relations between the agency and NATCA air traffic controllers was taking a toll on personnel numbers by forcing experienced controllers to walk out the front door.
Anyway, the FAA needed to do something to solve the problem and quickly.
The agency devised a new way of classifying controllers, a system designed to reduce the training time needed to certify an air traffic controller at a level where they are allowed to work without direct supervision. The reason for eliminating the need for direct supervision is that until a controller is completely checked out as ready to work all kinds of air traffic alone, it takes two controllers – one trainee and one trainer – to work the traffic it would normally take only one person.
So in the immortal words of Ross Perot, “Here’s the deal.”
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ASF Online Courses: Keeping Your Head in the Game
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When the urge to fly strikes me, but inadequate weather or funds make the satisfaction of this desire impractical, I often turn to the AOPA Air Safety Foundation Interactive Safety Courses. Spending an hour online isn’t the same as one in the air, but at least my head is flying, even if my body isn’t.
And all it costs me is an hour, because the courses–there are more than two dozen of them–are free. If you’re not an AOPA member, signing up for a free ASF account takes as much time as providing your name and address. What’s more, most of the courses qualify for the AOPA Accident Forgiveness and Deductible Waiver Enhancement program and and the FAA Safety Team Wings Pilot Proficiency Program.
On a beautiful sunny afternoon before last payday I discovered a new course, Do the Right Thing: Decision Making for Pilots. Getting into the seven-part course, I learned that I would, indeed, be flying that afternoon. Using videos of different VFR and IFR situations created in Microsoft Flight Simulator X, complete with ATC, pilot, and passenger communication, I had to choose one of the listed decisions using what I’d learned. The video then played out the flight based on my choice (or choices).
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TSA is after General Aviation this Time
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Lame ducks they call them … those federal employees who wander aimlessly between jobs every four years. The FAA’s Bobby Sturgell is a prime example – as of course is George W. Bush – although honestly no one
expected to see Sturgell in this role. The FAA administrator job was altered a decade ago specifically to insulate the position from the chaos that erupts during every election cycle. But a year ago, the White House and Congress botched the transition when Marion Blakey left which means acting administrator Sturgell will most likely be looking for a new job in January along with thousands of other political appointees. But Sturgell likes making speeches, so maybe he’ll head out on the circuit.
The more traditional and much more important element of a lame duck’s role is the inability – good or bad – to accomplish any meaningful work. To his credit, Department of Defense Secretary Robert Gates put the Air Force tanker acquisition process on hold last month because he realized that a new policy enacted by his department just before an election might well be undone by the new president anyway.
The TSA’s Kip Hawley apparently didn’t get the lame duck memo. And because of that, business aviation, in fact, just about all flying not related to the airlines is about to become a whole lot less user friendly. Remember the user-fee war? Think much worse.
Hawley’s growing federal TSA kingdom on which the taxpayers have spent tens of billions of dollars since 2002 recently let fly with a 260-page Notice of Proposed Rule Making (NPRM) that is certain to have far ranging effects on everyone who flies an aircraft. For now, the TSA’s public affairs office said the NPRM TSA – 2008 – 0021, is only available on the web site and is due to be officially published in the next few weeks.