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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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Race of Aces Looks Anew at World War II
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With the end of World War II lining up for its 75th anniversary celebration at EAA AirVenture Oshkosh, one might think there was little new information about the pilots who fought it. I was one of them, until I read the review of Race of Aces: WWII’s Elite Airmen and the Epic Battle to Become Master of the Sky, by John R. Bruning. (It should be no spoiler that I’ve already asked the library to add the 522-page tome published by Hachette Books to the its stacks.)
The reviewer, Elizabeth Wein, is no stranger to aviation’s preeminent conflict. She wrote A Thousand Sisters: The Historic Airwomen of the Soviet Union in World War II, which is a finalist for 2020 award for excellence in young adult nonfiction writing. Yet the names of the racing aces, Dick Bong, Tommy McGuire, Neel Kearby, Gerald Johnson, and Tom Lynch were new to her. Already well read on the exploits of these Fifth Air Force pilots, on whom the book focuses, I was ready to dismiss the new book as regurgitated history.
Fortunately, I kept reading. To improve morale, after Eddie Rickenbacker visited the far Pacific outpost in 1942, Gen. George Kenny challenged his pilots to surpass Rickenbacker’s World War I tally of 26 kills. “Rickenbacker and Kenny each agreed to stand the winning pilot a case of Scotch, and the race was on.” This I did not know, had never heard, and I want to know more (hence the library request for the book).
Almost every warbird geek knows that Dick Bong was America’s leading ace with 40 victories, so he should have won the Scotch. And I’m sure Race of Aces will go into details about their telling dogfights. That’s not what I’m interested in because I’ve already read some version of what the book will share. My interest is learning more about the pilots beyond their combat experiences, and the review promises this.
Saying that Bruning, the book’s author, “is at his best when he delves into the pilots’ anguish and obsessions.” And “his telling is based on a dragon’s hoard of primary source material, including well over 1,000 interviews he conducted himself.” Since so few of these noted pilots survived the war, I’m curious to learn what new perspectives these sources have to share because they give shape to the human forms that fight in any conflict. — Scott Spangler, Editor
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Does Your Airport Have a Wildlife Management Plan?
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If wildlife encounters have made your flying life interesting during last year’s flying season, winter is the time to start thinking about doing something about it before the migrating critters return to your small nontowered aerodrome. Start by asking your airport manager and/or airport if the field has done a wildlife assessment and devised a wildlife management plan. If it has, get a copy and read it. What you learn may surprise you.
Airports certificated under Part 139 must conduct wildlife hazard assessments and develop wildlife management plans. This is no simple, quick, or easy endeavor. It requires time, a certified wildlife affiliated biologist who spends up to a year determining what critters may interact with flying machines each season. With this data, the biologist and airport personnel develop the airport’s Wildlife Hazard Management Plan, also required by Part 139.
The process sounds simple, but guess again. The assessment and resulting plan usually involve the US Department of Agriculture, Wildlife Services; the US Army Corps of Engineers (which oversees the nation’s water resources); The US Environmental Protection Agency (if anything from pesticides to landfills is involved); US Fish and Wildlife Service (which oversees migratory birds and federally listed wildlife and their well-being). And then there are all the state natural resources, wildlife, and environmental agencies. When dealing with airport wildlife, killing it is the last option, not the first, and it requires more than a few permits.
The FAA’s National Plan of Integrated Airport Systems lists nearly 3,300 airports that are eligible for Federal Airport Improvement Program. Of this number, fewer than 650 have towers whose controllers can warn pilots of wildlife activity. At nontowered airports (as well as privately owned, public use fields and private strips), pilots are on their own to see and avoid not only other airplanes but also the birds and other critters who have no understanding or appreciation of right of way.
The FAA recommends that operators of public-use airports “implement the standards and practices contained in the applicable Advisory Circulars.” If the airport has received AIP funding, they don’t have a choice in the matter, but they can also apply for funding to help pay for the wildlife assessment and management plan.
If your aerodrome is public-use but isn’t eligible for (or hasn’t been blessed with) AIP funding, start with AC 150/5200-32B, Reporting Wildlife Aircraft Strikes, and work with all of the pilots who fly there to report their strikes. This feeds the FAA’s National Wildlife Aircraft Strike Database and the FAA’s Feather Identification Program, which can give pilots a heads-up on the critters they may face when flying to your (or nearby) airport.
AC 150/5200-33, Hazardous Wildlife Attractants On or Near Airports may give you some ideas on ways you can mitigate wildlife that aren’t too involved, like making sure all of the dumpsters are closed up. And if your community is thinking about a new dump near the airport, read AC 150/5200-34, Construction or Establishment of Landfills Near Public Airports before you attend the public meetings on its creation.
If your wildlife effort somehow manages to raise the funds necessary for a wildlife assessment for your airport, AC 150/5200-36 and AC 150/5200-38 respectively address the qualifications the biologist must possess and the protocol for conducting the assessment. There is much more to read on the FAA’s Wildlife Regulations, Guidance, and Resources page. And if you are really curious, look at Wildlife Hazard Management at Airports.
For more information on promoting wildlife strike awareness and mitigation, visit Bird Strike Committee USA, a volunteer organization that holds an annual conference (August 25-27, 2020 in Minneapolis).
Ultimately, pilots should be critter aware on every flight. Winter is no guarantee that all of them have moved to warmer climes or are taking a nap. In many places, snowy owls arrive with the cold white stuff that falls from the sky. They like airports because airport signs give them an excellent perch to search for prey on a vast expanse of level ground. — Scott Spangler, Editor
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Pilots, OTC Drugs Can Be Interactively Bad
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A recent New York Times story about the hidden drug epidemic rooted in the conflict between prescribed medications and over-the-counter (OTC) drugs and supplements focused on people in their 60s, but as I read, I could easily see that pilots taking prescribed medications could also be unknowing participants.
According to the article, people in their 60s take an average of 15 prescriptions a year. “And that’s in addition to the myriad of over-the-counter drugs, herbal remedies, vitamins and minerals they may take, any of which — alone or in combination — could cause more problems than they cure.”
Taking aspirin or another nonsteriodal anti-inflammatory drug (NSAID) such as ibuprofen, for example, could heighten the chances for bleeding for those taking a prescribed anticoagulant like Coumadin.
This combination of prescribed and OTC drugs—and their interactive side effects—is known as “polypharmacy.” It is the result, the article said, “of our fragmented health care system, rushed doctor visits, and direct promotion of drugs to patients who are ill equipped to make rational decisions about what to take, what not to take, and when.”
Contributing to it are the number of prescribing physicians, who may not know what the prescribed and OTC drugs the person is taking, and this is what made me think of pilots, especially if they fly for a living. Rare is the professional pilot I’ve known who will volunteer anything that might put a medical certificate in jeopardy.
Given the consequences to such pilots and those who fly with them, this is foolish and shortsighted. Everyone should compile a list of every prescribed and OTC drug and supplement they consume and use it as a checklist when any doctor asks what you’re taking. And if the doc doesn’t ask, be a proactive patient and present it before the appointment end, especially if there is another prescription in the offing.
Before any pilot swallows an OTC drug new to them, they should read the FAA Aviation Safety page, Pilots and Medication. Here’s the attention getter: “Impairment from medication, particularly over the counter (OTC) medication, has been cited in a number of accidents in general aviation. In a 2011 study from the FAA’s CAMI Toxicology Lab, drugs/medications were found in 570 pilots (42%) from 1,353 total fatal pilots tested. Most of the pilots with positive drug results, 511 (90%), were flying under CFR part 91.”
Then pilots should run the OTC checklist in What OTC Medications Can I Take and Still be Safe to Fly? An affirmative answer to questions such as “Am I having trouble clearing my ears at ground level?” and “If currently taking a medication only for symptom relief, would you be safe to fly without it?” yields this warning: “STOP. You might not be fit to fly!”
This page includes a table that lists go/no-go medications and the rational for the rating. The table also lists the medication or active ingredient that determines the medication’s go or no-go rating. The table lists the frequently used OTC medications: Antihistamines; Nasal Steroids; Nasal Decongestants; and Cough remedies.
After reading the active ingredients in the go/no-go table, you’re ready for the three-step evaluation of choosing an OTC medication. 1. Identify the active ingredients. “Verify that you have taken this medication in the past with no side effects. 2. Read the label. If it warns of possible drowsiness or to “be careful when driving,” it is not safe for flying. 3. Read the directions carefully. “If this is the first time you are taking a new medication, wait at least (5) dosage intervals and ensure that you suffer no adverse effects from it before flying while on the medication.”
A pilot’s aviation medical examiner is the ultimate resource when it comes to avoiding interactive drug problems. If there is a conflict between the prescription and OTC medications, an AME, said the Pilots and Medication page, in many cases can recommend treatment options “that may allow you to fly.” — Scott Spangler, Editor