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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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What Makes an Ace in the 21st Century?
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When it was revealed in a BBC interview, The Fighter Pilots Hunting Houthi Drones Over the Red Sea, that Marine Captain Earl Ehrhart, an AV-8B Harrier pilot aboard the USS Bataan, had downed seven drones, subsequent stories on this action hailed him as America’s newest ace, the first since the last helo left Saigon in April 1975.
“The Houthis were launching a lot of suicide attack drones,” says Ehrhart, and to be effective against this rebel group, the marines needed to adapt, the BBC story reports. “‘We took a Harrier jet and modified it for air defence,’ Ehrhart tells me. “We loaded it up with missiles and that way were able to respond to their drone attacks.’” In the next sentence, the experienced fighter pilot said he intercepted seven Houthi drones.
Nowhere in the BBC article is the word ace. It seems that aviation editor and authors applied this appellation without fully contemplating the necessary attributes of becoming an ace beyond five victories. For some concise insight, I turned to the American Fighter Aces Association, founded in 1960 to recognize the over 1,450 combat pilots from World War I to the present that achieved the status of American Fighter Ace by destroying five or more hostile aircraft in air-to-air combat.
Given their intent and mission, the Houthi drones are, without a doubt “hostile aircraft.” And Capt. Ehrhart and all the other AV-8B and F-18 pilots have certainly destroyed these pilotless drones. But the key ingredient missing in earning the title of ace is, as the American Fighter Aces Association clearly states, is destroying these “hostile aircraft in air-to-air combat.”
Downing a drone with a missile does not meet the definition or spirit of aerial combat, “a fight between individuals or groups.” Yes, the Houthis are a group, but all they are doing is programming their drones to hit terrestrial targets and ships, not defend themselves against a Harrier or Super Hornet. When artificial intelligence matures and undertakes a drone’s defensive capabilities, destroying it in air-to-air combat will count toward the title of ace. And if AI destroys its opponent, it will be one tally closer to the title.
Until that time, lets appreciate and recognize our aviators for the multitude of risks they face on every sortie but reserve the accolade of ace for those who achieve it in a competitive arena. — Scott Spangler, Editor
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Lessons Learned from an Industry Bankruptcy
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It’s about trust
I remember riding our crew bus with a bunch of other pilots, and flight attendants in the spring of 1991 not long after our employer Midway Airlines had filed for Chapter 11 bankruptcy protection. The old red and white school bus ran the flight crews from the parking lot on Midway Airport’s north side parking lot along 55th Street to the terminal so we could connect with our aircraft. Since pilots have all the solutions to every problem on Earth (just ask one) a bunch of us were complaining about the current state of the airline and our future. Being a big mouth — yes, even then — I wondered why Dave Hinson, our CEO was still running the place. “If Hinson was in charge when we entered bankruptcy, why should we expect he’ll be able to get us out?” After a few nods, the back of the bus was quiet for a few minutes before we moved on to complaining about the crew meals.
As it turned out, my worries about what the big guy at the airline’s helm would be able to accomplish continued as Midway Airline continued its decline. For a few weeks though, we thought there was a silver lining to the dark cloud we all found ourselves beneath when word came that Midway was about to be purchased by Northwest Airlines (Northwest was later absorbed by Delta). We were overjoyed that somehow the management team had managed to pull a save out from the throws of Chapter 11. Our celebrations were short-lived, however, when on November 12, 1991, Northwest informed Dave Hinson they were pulling out of the negotiations. The original Midway Airline ceased operation the next day on November 13, 1991.
After Midway
Many of those memories have come flooding back to me over the past few weeks as the latest crisis erupted at Boeing, a company also once headquartered in Chicago. The current mess began when a door plug ripped a gaping hole in the fuselage of an Alaska Airlines 737 Max 9 on January 5th. Luckily no one was killed although many cabin items not tied down were sucked out of that fuselage hole when the cabin depressurized. It all could have been much worse. The door plug was eventually located in the backyard of a local high school science teacher. I think his name was Bob.
And what’s the connection between my former life at Midway and Boeing’s current jam? A bunch of Midway employees didn’t think Dave Hinson and the airline’s board of directors back then could save the ailing carrier. And as for Boeing? A recent story in Fortune magazine said, “Business pundits are watching closely to see whether CEO Dave Calhoun can lead Boeing through the aftermath of its latest crisis or if he’ll be replaced. But Boeing’s board also deserves scrutiny …” (more…)
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Aviation Safety Semantics
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As a word merchant and an aviator, words are important. They are the foundation of communication, and in many instances they can be the difference between life and death. “Hold Short” is but one example. Equally important is our semantic understanding of the aviation lexicon, what each of the words mean.
Take “accident,” for example. Millions of words have been written and spoken about this word, its outcomes, its trends, and its persistent place in aviation. But have you ever given thought to what this word means? Here is what the 11th edition of Merriam-Webster’s Collegiate Dictionary has to say:
Accident—noun
1a: an unforeseen and unplanned event or circumstance
b: lack of intention or necessity : CHANCE
2a: an unfortunate event resulting especially from carelessness or ignorance
As this relates to aviation, accidents are unfortunate and, for the most part, unplanned. Suicidal best describes pilots who take off intending to return to earth unsafely. Pilots who consider aviation’s unfortunate outcomes unforeseen may best be described by the second aspect of the definition: careless and ignorant.
Pilots have been choosing from the same menu of fatal outcomes for more than a century now, so how can anyone categorize them as “unforeseen?” No one is ever immune from the possibility of any of them on any flight. Regardless of our intentions we each are ultimately responsible for the consequences of our decisions.
Every student pilot learns, to some degree or another, about Five Hazardous Attitudes, their symptoms, and the consequential umbrella that covers them all:
Anti-authority: Those who do not like anyone telling them what to do.
Impulsivity: Those who feel the need to do something, anything, immediately.
Invulnerability: Those who believe that accidents happen to others.
Macho: Those who are trying to prove that they are better than anyone else. “Watch this!
Resignation: Those who do not see themselves making a difference.
Knowing about these attitudes is good, but it is just a halfway effort without balancing them with some beneficial attitudes pilots should relentlessly strive to embody. You can compile your list, but here’s one to get you started:
Circumspect—adjective
: careful to consider all circumstances and possible consequences : PRUDENT
Employing all that this word embodies to every aspect of aviation before acting can only improve safety. But just as we each are responsible for the consequences of decisions whether they be good or bad, we humans are not infallible, so unwanted outcomes will continue to occur with unwanted regularity. But we should stop referring to them as “accidents.” The military has a better word and definition for it:
Mishap—noun
: any unplanned, unintended event or series of events that results in death, injury, illness, or property damage.
But whatever word you use to describe it, remember to be circumspect. — Scott Spangler, Editor
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