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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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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
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ASRS Callback Humility Recalibration
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Humility is the absence of vanity or excessive pride, a state or quality of being humble. Humble individuals are conscious of—and acknowledge—their defects or shortcomings. They are modest and not overly proud. Humility is an essential element in aviation safety, and it needs to be periodically recalibrated at least annually.
This self-assessment depends, on large part, on how the aviator’s year has gone. If it could have been better, most likely these less than happy events have already recalibrated a pilot’s humility. On the other hand, if a pilot has had a good year (or consciously forgotten the unfulfilled consequences of less than stellar decisions), then the aviator should take stock and recalibrate because no one flies without fault.
There is no better place to reassess one’s aeronautical humility than Callback, published by NASA’s Aviation Safety Reporting System. It receives, processes, and analyzes thousands of incident reports that pilots submit annually. It publishes the more interesting incidents in each issue and publishes the ASRS Year End Roundup in December, which is perfect for a pilot’s annual humility evaluation and recalibration.
In tune with the season, the Callback roundup is a “lighthearted medley” complied from the 108,000 reports ASRS received this year. Although I’d wager that the pilots making the reports were not so lighthearted when the situations they described were unfolding.
Imagine, you’re a private pilot winging your way out of the Washington, DC, Special Flight Rules Area when your 50-pound dog jumps from the back to the front seat. In the process it hit the panel and cleared the flight plan out of the Garmin 430, pulled the cigarette lighter power cord for the GDL 39, knocked the tablet to the passenger side floor, and “ripped the microphone port of my headset out at the connector.”
The pilot didn’t realize that his dog had disconnected his mic when ATC’s calls made clear that they could not hear him. It took him a while to untangle the cord from his dog and its leash while trying to fly the plane and not bust the Class B or the Flight Restricted Zone.
If, at any time while reading this report, or any other, you thought that “I’d never do that!” or “That would never happen to me!”, then you need to recalibrate your humility. In one form or another, it can happen to all of us. All it takes is a moment of inattention or assumption.
Just ask the ASRS Roundup pilot whose twin Bonanza was topped off with Jet A. In a hurry to secure the airplane in weather, he requested “top off main tanks only” without specifying what to top them off with. He likely assumed that the new line service guy would read the 100LL placards, and if that failed, the Jet A duckbill nozzle would prevent him from putting the wrong go juice in the airplane.
But that didn’t happen. The Jet A truck didn’t have a duckbill nozzle, and the gas guy was new to aviation. Fortunately, the pilot caught the error when he saw the big JET A label on the truck, but he didn’t see it until his tanks were topped off. Pilots who think this could not happen to them either watch every drop that goes into the tanks, or they trust their lives to the line crew. In either case, a humility adjustment might be in order.
Ultimately, it is to every pilot’s benefit to read each issue of the ASRS Callback. This not only keeps pilots humble, it builds a mental library of less than safe circumstances that might grab their attention and arrest their progress on the error chain. — Scott Spangler, Editor