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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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Pilot Pride and Keeping Current with the Airman Certification Standards
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Pilot pride comes with the certificates and ratings achieved through successful checkrides. But like flying itself, maintaining one’s pilot pride properly is a never-ending effort. Human nature is an ever-present foe. Complacency replaces striving to be better on every flight, and boastful delusions take the place of yesterday’s abilities. Proper pilot pride abhors such delusions, and the Airman Certification Standards can help.
For those who were not paying attention, the FAA started replacing the Practical Test Standards (PTS) with Airman Certification Standards (ACS) in June 2016. Perhaps you were aware of this because of the kerfuffle over the FAA’s modification of the Slow Flight/Stall tasks.
The ACS enhances the PTS with task-specific knowledge and risk management ingredients, with the goal of getting a pilot’s head and hands on the same page. In FAA-speak, the ACS articulates what applicants and their teachers must KNOW, CONSIDER, and DO to pass a checkride for a given certificate or rating.
The FAA updated the airplane private pilot and instrument ratings, and introduced the airplane commercial pilot ACS, in June 2017. And it is again updating the ACS, which become effective June 11, 2018.
If a pilot certificate has been your back-pocket passenger for a decade or more, you may be wondering why you should care about this. On any given day, the ability to meet the certification standards for each certificate and rating proclaimed on that little piece of plastic is—and should be—the foundation for any pilot’s pride in being a competent aviator.
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Favorite Flights I Never Flew
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RSS FeedFavorite Flights I Never Flew, by Micah Engber, contributor
The mid to late 1980’s were the heyday of Frequent Flyer Programs. Since deregulation, the advent of low-cost airlines a-la People Express and Southwest, the mainline carriers were searching for a means to maintain their customer base, or as some said, their “strangle hold” on the industry. Frequent Flyer Programs started with American Airlines and quickly spread to all the others. By coincidence, this was also the time when, while living in Pueblo, Colorado, I was doing a good deal of commercial flying.
Pueblo was only served by Rocky Mountain Airlines (Continental Express) when I started flying from there and that was fine by me. There were three or four daily flights back and forth to the Denver, Stapleton hub, and I always loved climbing on board the de Havilland Dash-7’s or Dash-6 Twin Otters. (Later America West made a daily stop on a 737 flight from Phoenix to Colorado Springs and back. It always seemed like it would have been strange to fly the less than 50 mile leg PUB to COS but I never had the opportunity.)
I joined the Continental One Pass Program early on and was soon an Elite Platinum member. What a wonderful way to fly! In those days most flights were way below capacity which meant I was almost always bumped up to First Class. Although First Class amenities weren’t even near what Business Class is today, it was still pretty spectacular compared to coach. All of the gate agents in Pueblo and some in Denver knew me by name and I was treated like a king.
Many people remember the baggage disaster that took place when the new Denver airport opened, but really it wasn’t very different from the old days back at Stapleton. The Continental Express concourse was located at the other end of the airport from Continental’s mainline terminal and although it seemed my bags always made it outbound with me, they generally never accompanied me home. But the service was still spectacular.
When I would arrive home in Pueblo the gate agent, having already seen my name on the flight manifest and recognizing me as a very frequent flyer, would pull me aside, tell me my bags didn’t make and that they would be delivered right after the next flight was turned around. Who could ask for more?
I kept flying and kept my points banked. At that time, status with Frequent Flyer programs was based on points accumulated, not annual miles flown. I was in great shape as a Platinum One Pass member.
By 1990 I could see that Frequent Flyer programs were changing along with the airline business. People Express had disappeared as had the original Frontier. Eastern Airlines and Pan Am were in trouble. TWA and America West were not far behind. Frequent Flyer programs were changing, and not for the better.
I had moved to Maine and also found that while wealthy with points I was not very liquid in cash. If points were stocks it was time to sell. So I did, both literally and figuratively.
After reserving a few points for something in particular I had in mind; I sold off the remaining points for cash through some specialty travel agents. I must say I did very well. Then I went ahead and used the reserved points for a special flight.
My parents had been talking about another trip to Paris for some time. They had been there together before, and my father had been there on his own many times during World War II. He even studied at The University of Paris post war.
Their 35th wedding anniversary was coming up and it was time to get them back to Paris. Still being within the golden years of Frequent Flyer programs, as a special anniversary present I was able to use my points to get them to Paris, round-trip in First Class. It was not a flight for me to fly, but nonetheless a memorable one that was worth every last point used for it. (more…)
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AirVenture 40 and Rooting in Memory’s Bin
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For many in aviation, attending EAA AirVenture Oshkosh is an annual touchstone and we recall our participation in many ways. Mine is a memory bin, the yellow office trash can I got from Crate & Barrel when the U.S. Navy finished with me in February 1978. It displays the Champion stickers that mark my pilgrimage in anal-retentive columns six stickers. I’m on my seventh column now, and as I have for decades, I’ll pocket my 40th Champion sticker on the first day, this year on July 23, as a token of good things to come.
Each one is a multicolored oval that highlights the year. The colors are never the same, but all of them appear to be on a ribbon headed by EAA, with the Champion bowtie logo providing the ribbon’s tails. Individually, they are visual mnemonics that recall each year’s pilgrimage. As it is for anyone’s first time, my inaugural participation in 1978 overwhelmed me. The dominant memories are my o-dark-thirty departure and a three-hour drive for a gate-opening arrival, wandering freely along the flight line that was open only to EAA members and pilots, and setting up camp Saturday night in Schiefelbein’s cow pasture.
Other stickers recollect the weather. There was the triple-digit heat in the early 1980s, and more than a few years when I sought shelter from a deluge in a Porta-Potty. A decade later the unforecast cold weather justified the purchase of an insulated flight jacket to my first wife. And almost every year recollected a daily battle with dehydration. I won’t bore you with all the people and planes buzzing now between my ears.