Tag: Aviation

To provoke

Social media provocateurs are on the rise. Say something that’s a bit on the edge and wait for the avalanche of responses. It’s a way of getting traffic to a site. The scientific and technical sphere has these digital provocateurs less than the glossy magazine brigade, but the phenomena is growing.

Take a method or technique that is commonly used, challenge people to say why it’s good while branding it rubbish. It’s not a bad way to get clicks. This approach to the on-line world stimulates several typical responses.

One: Jump on-board. I agree the method is rubbish. Two: I’m a believer. You’re wrong and here’s why. Three: So, what? I’m going to argue for the sake of arguing. Four: Classical fence sitting. On the one hand you maybe right on the other hand you may be wrong.

Here’s one I saw recently about safety management[1]. You know those five-by-five risk matrices we use – they’re rubbish. They are subjective and unscientific. They give consultants the opportunity to escalate risks to make new work or they give managers the opportunity to deescalate risk to avoid doing more work. Now, that’s not a bad provocation. 

If the author starts by alleging all consultants and managers of being manipulative bad actors that sure is going to provoke a response. In safety management there are four pillars and one of them is safety culture. So, if there are manipulative bad actors applying the process there’s surely a poor safety culture which makes everything else moot.

This plays into the discomfort some people have with the inevitable subjectivity of risk classification. It’s true that safety risk classification uses quantitative and qualitative methods. However, most typically quantitative methods are used to support qualitative decisions.

There’s an in-built complication with any risk classification scheme. It’s one reason why three-by-three risk matrices are often inadequate. When boundaries are set there’s always the cases to decide for items that are marginally one side or other side of a prescribed line.

An assessment of safety risk is just that – an assessment. When we use the word “analysis” it’s the supporting work that is being referenced. Even an analysis contains estimations of the risk. This is particularly the case in calculations involving any kind of human action.

To say that this approach is not “scientific” is again a provocation. Science is far more than measuring phenomena. Far more than crunching numbers. It includes the judgement of experts. Yes, that judgement must be open to question. Testing and challenging is a good way of giving increased the credibility of conclusions drawn from risk assessment.

[1] https://publicapps.caa.co.uk/docs/33/CAP795_SMS_guidance_to_organisations.pdf

Artificial intelligence (AI) transition

There’s much that has been written on this subject. In fact, for a non-specialist observer it’s not so easy to get to grips with the different predictions and views that are buzzing around.

There’s absolutely no doubt that Artificial intelligence (AI) will change every corner of society. Maybe a few living off-grid in remote areas will remain untouched but every other human on the planet will be impacted by AI. Where there’s digital data there will be AI. Some will say this brings the benefits of AI into our everyday and others herald a pending nightmare where we lose control.

Neither maybe totally on the money but what’s clear is that this is no ordinary technological transition. Up until now, the software we use has been a tool. Built for a purpose and shaped by those who programmed its code. AI is not like that at all. It’s a step beyond just a tool.

Imagine wheeling a hammer that changed shape to suite a job, but the user had no control over the shape it took. How will we take to something so useful but beyond our immediate control?

In civil aviation, AI opens the possibility of autonomous flight, preventive maintenance, and optimal air traffic management. It may work with human operators or replace them in its more advanced future implementations. Even the thought of this causes some professional people to recoil.

I’ve just finished reading the book[1] of a former Google chief officer, Mo Gawdat and he starts off being pessimistic about the dangers of widespread general AI. As he moves through his arguments, the book points to us as the problem and not the machines. It’s what we teach AI that matters rather than the threat being intrinsic to the machine.

To me, that makes perfect sense. The notion of GIGO[2] or “Garbage In, Garbage Out” has been around as long as the computer. It does, however, put a big responsibility on those who provide the training data for AI or how that data is acquired.

Today’s social media gives us a glimpse of what happens when algorithms slavishly give us what we want. Anarchic public training from millions of hand-held devices can produce some undesirable and unpleasant outcomes.

It maybe that we need to move from a traditional software centric view of how these systems work to a more data centric view. If AI starts with poor training data, the outcome will be assuredly poor.

Gawdat dismisses the idea that general AI can be explainable. Whatever graphics or equations that may be contrived they are not going to give a useful representation of what goes on inside the machine after a period of running. An inability to explain the inner working of the AI maybe fine for non-critical applications but it’s a problem in relation to safety systems.

[1] Mo Gawdat. Scary Smart, the future of artificial intelligence and how you can save our world. 2021. ISBN 978-1-5290-7765-0.

[2] https://techterms.com/definition/gigo

High ALT

Normal commercial air traffic control doesn’t go beyond 60,000 ft in altitude. That makes sense since civil flying activities have been limited to lower altitudes. In fact, modern commercial airliners are not designed to fly above about 45,000 feet. This is a compromise based on what works commercially as much as what’s works best. Aircraft instruments are calibrated making standard assumption about the atmosphere.

For some of its flight, Concorde cruised at a height of 60,000 feet. More like a military jet, with its speed it had the capability to make use of higher altitudes.

It’s even possible to fly above 50,000 feet without an engine. The world record glider flight by AIRBUS shows it’s possible.

The Earth’s atmosphere is not uniform. It changes its characteristics with altitude. The atmosphere can be divided into five layers, as the temperature and density change. They are named: Troposphere, Stratosphere Mesosphere, Ionosphere and Exosphere. 

The Troposphere is a layer that goes from 8 kms (26,247 ft) on the poles to about 18 kms (59,055 ft) on the equator. This is the layer where weather is experienced.

On average, the Stratosphere goes up to about 40 kms (131,234 ft). The winds blows fast but they tend to be more consistent as they wrap around the globe. The lower portion of the Stratosphere is virtually isothermal (layer of constant temperature). 

A medieval English philosopher and Franciscan friar, Roger Bacon[1] figured out that the air might support a ship in the same way that water supports ships. In the 13th Century that was a nice academic conclusion but little more.

With all the current controversy surrounding high altitude balloons, that the road to flight started with balloons, could be said to be a bit ironic. It’s long been known about that balloons fly well at high altitudes but it’s a new frontier as far as commercial activity is concerned. For science, weather balloons may go up to 40 km to measure the high level winds.

Some experimental work has been done on trying to commercially use the airspace above normally civil flying. The Google Loon trials[2] are an example of an attempt to float a telecommunications platform high in the sky. These balloon trials were abandoned as difficulties proved greater than anticipated.

It’s not so easy to keep a high altitue balloon on-station.

Now, considering the news in North America, maybe high-altitude operations ought to be a matter of regulatory concern. This is not a subject that any one country can address alone.

There is some legal, regulatory and technical work[3] underway in Europe[4] but it needs to make progress. This is a subject for international collaboration. 

[1] https://en.wikipedia.org/wiki/Roger_Bacon

[2] https://blog.x.company/loons-final-flight-e9d699123a96

[3] https://www.eurocontrol.int/article/echo-making-space-new-high-altitude-entrants

[4] https://www.eurocontrol.int/events/european-higher-airspace-operations-symposium

UFO

It’s intriguing. Reports of unidentified flying objects being shot down over Alaska, Canada, and Michigan prompts a lot of questions.

The Earth’s atmosphere eventually becomes space at 100 km up. The Kármán line[1] is one way to define the boundary. All aeronautic activities are deemed to take place below that imaginary line. Theodore Karman[2] did his best to determine a height at which the Earth’s atmosphere is too thin to support flight. Now, there’s an international discussion about bringing that boundary down to 80 km. That is the hight above which a person in a space vehicle is said to become an astronaut.

I guess my point is that there’s a lot of the Earth’s atmosphere to continuously monitor, if the task is to know about everything that is flying everywhere. So, it’s perfectly reasonable that reports of unidentified flying objects will crop up, now and then.

It doesn’t mean that there are alien probes popping in to keep an eye on us earthlings. No, in so far as is commonly known there’s no evidence that stands up to scrutiny to definitively prove the existence of sustained airborne craft that are not of this Earth. However, extra-terrestrial objects fall to Earth all the time. Mostly ice and rocks. I wrote about objects falling from the sky in an earlier article.

It’s worth recalling the first article of the Chicago Convention on Sovereignty:  

The contracting States recognize that every State has complete and exclusive sovereignty over the airspace above its territory.

For those monitoring what’s in the air, the primary concern remains about flights over land and populated areas. This is the case where hazards can exist to those below.

All said and done, it’s no time to become alarmed. It may well be the case that these unidentified flying objects were previously ignored. Only now has the militaries in North America been galvanised into action and being more vigilant. The more people look, the more people see.

What do I know? Spy balloon, craft and drones may be much more common than has been generally reported.

Claims and counter claims that everyone is doing it shouldn’t be dismissed out of hand. The technology involved in flying above normal air traffic has a multitude of potential applications. A framework for higher altitude operations is now being written[1].

POST: Diplomatic tensions between the US and China continue to escalate as the US explains its shooting down of high altitude flying objects over North America. Much is still to be uncovered.

[1] https://www.eurocontrol.int/article/echo-making-space-new-high-altitude-entrants

[1] https://www.fai.org/news/statement-about-karman-line

[2] A Hungarian American physicist and engineer who was born 11 May 1881.

Fatal accident in Nepal 3

The air transport year started badly. A Yeti Airlines twin-engine ATR 72-500[1] aircraft plunged into a gorge as it was approaching Pokhara International Airport (PKR) in Nepal.

Singapore’s Ministry of Transport (MOT) is supporting Nepalese authorities.

The latest news is that the aircraft’s Flight Data Recorder (FDR) and Cockpit Voice Recorder (CVR) have been replayed. It is reported that the analysis of the FDR and CVR data shows that the propellers of both engines were feathered during approach.

It is not known if this was due to the actions of the crew or a technical fault.

The investigation continues.

The propellers on this aircraft type have pitch control of their blades. The pitch of the blades can be changed to the “feather” position (approximately 90 degrees). Feathered blades reduces the drag that would occur in the event of an engine shutdown.

This event occurring while the aircraft is slowing on approach will have an impact on the aircraft’s air speed. Monitoring air speed on approach is vital.

The suspicion that the aircraft may have stalled remains one theory.

The normal actions required on an approach are called up on a checklist. 

Example: Here is a video of an ATR 72-500 landing.

Notice the pilots’ hands at 4:57 minutes in.

An incident involving an aircraft of the ATR 72 type on the way from Stockholm to Visby[2] is interesting but may not be relevant in the Yeti Airlines case.

[1] https://skybrary.aero/aircraft/at75

[2] https://www.havkom.se/en/investigations/civil-luftfart/tillbud-med-ett-luftfartyg-av-typen-atr-72-pa-vaeg-fran-bromma-till-visby

Apprenticeships

What do you think are the reasons behind the overall decline in engineering apprenticeship starts in recent years? We are particularly interested in understanding more about supply and demand.

What do you think are the reasons behind the overall decline in engineering apprenticeship starts in recent years? We are particularly interested in understanding more about supply and demand.

Image. It persists even now. In fact, the paper[1] that asks these questions has images of spanner turning. It’s so easy to pick royalty free pictures that pop-up from search engines searches. These images show mechanics in blue overalls. Don’t get me wrong, this is not the least bit disrespectful of spanner turning.

A deep cultural memory persists. It has multiple elements. You could say, in part, industrialisation, still conjures up images of dark satanic mills contrasted with grand country homes of a class of business owners. Basically, dirty, and clean as two key words.

The Victorians did a great deal to both elevate engineering personalities, like Brunel[2], but to hold them as different or apart from the upper middle-class society that the fortunate aspired to join. Those who forged the prosperity of the age had to work hard to be accepted in “society”.

Today, it makes no difference that’s it’s American, popular comedies like “The Big Bang Theory[3]” entertain us immensely but pocket the “nerd” as eccentric, peculiar and unfathomable. I admit this is attractive to a proportion of young people but maybe such shows create exclusivity rather than opening people’s eyes to possibilities.

Having Government Ministers standing=up can calling for Britan to become a version of Silicon Valley doesn’t help. Immediately, that signal is heard from those in authority, young people switch “off”. To boot, the image conquered up is a whole generation out of date. We have the Windows 95 generation telling the iPhone generation what’s the best direction to get to the 2030s.

Here’s a proposition – you must see yourself as an “engineer” to become an engineer. That can be said of a whole myriad of different professions. Each with a common stereotype. Look at it the other way. If you cant’t see yourself as a person who can shape the future, it isn’t likely you will choose engineering.

My observation is that we need to get away from too many images of activities. In other words, this is an engineer at work. This is what they do. This is what they look like. What we need to address is the touchy-feely stuff. Let’s consider how young people feel about the world they have inherited from my generation.

A high level of motivation comes from the wish to make changes and the feeling that it’s possible to make changes. That the skills picked-up as an apprentice will help you shape the future. Engineering is part of making a better world.

[My history is that of an Engineering Industry Training Board (EITB) apprentice who started work in 1976.]

[1] https://www.engineeringuk.com/media/318763/fit_for_the_future_knight_and_willetts_apprenticeship_inquiry_euk_call_for_evidence.pdf

[2] https://en.wikipedia.org/wiki/Isambard_Kingdom_Brunel

[3] https://www.imdb.com/title/tt0898266/

Fatal accident in Nepal 2

We are now one week from the fatal accident that occurred on Sunday, 15 January in Nepal. Yeti Airlines Flight 691, an ATR 72-500 aircraft, crashed while on approach at Pokhara International Airport in Nepal

We are now one week from the fatal accident that occurred on Sunday, 15 January in Nepal. Yeti Airlines Flight 691, an ATR 72-500 aircraft, crashed while on approach at Pokhara International Airport in Nepal[1]. Sadly, this accident resulted in 72 fatalities. No one survived. Only one body remains to be discovered[2].

This has been Nepal’s deadliest aviation accident in over 30 years.

After years of pandemic-caused travel disruption this land locked nation was hopeful that their new airport would bring the tourists back. The nation’s second-largest city sits in the shadows of a towering mountain range. It’s a picture postcode setting for this tragedy.

Nepal’s government has set-up a five-member committee to investigate the accident.

As stated in the International Civil Aviation Organisation (ICAO) Annex 13, Aircraft Accident, and Incident Investigation[3], it’s the responsibility of the State of Occurrence to lead an investigation. The objective of that investigation should be prevention of future accidents and incidents. It’s not the purpose of a technical activity to apportion blame or liability.

Nepal is the State of Registry and the State of the Operator, but they must notify the State of Design, the State of Manufacture (France) of the aircraft and ICAO in Montreal.

There are numerous speculations concerning the cause of this accident. The scant evidence available on social media does suggest that this aircraft accident fits into the category of Loss of Control in Flight. However, that suggestion is purely informed conjecture at this time.

I agree with David Learmount[4] in that it’s likely that this will be found to be a preventable accident. That said, once the accident flight recorders have been replayed there should be a substantially better indication of what really happened on that fateful day.

Whereas it was previously reported the accident recoders were going to France it’s now reported that they are going to Singapotre for replay Black boxes from Nepal plane crash to be sent to Singapore – ABC News (go.com)

Based on the experience of the analysis of numerous accidents it’s unlikely to be a simple single cause. Such fatal aircraft accidents are often combinations of factors that come together. Approach to a new airport plus an unexpected event or error plus aspects of organisational culture can be enough to tip the balance.

Aviation, in itself, is not inherently dangerous. But to an even greater degree than the sea, it is terribly unforgiving of any carelessness, incapacity or neglect.

A quote of Captain A. G. Lamplugh, British Aviation Insurance Group, London. c. early 1930’s. This famous phrase has been reproduced on posters many times.

POST: Here’s some examples of what can happen again and again. Lessons learned from business aviation accidents maybe equally applicable to this case. Lessons Learned from Business Aviation Accidents | NBAA – National Business Aviation Association

[1] https://aviation-safety.net/database/record.php?id=20230115-0

[2] https://www.thehindu.com/news/international/nepal-plane-crash-search-continues-for-lone-missing-person/article66415303.ece

[3] https://store.icao.int/en/annexes/annex-13

[4] https://davidlearmount.com/2023/01/21/regional-airline-safety-really-doesnt-have-to-be-this-bad/

Still learning leasons

Mobility has transformed society. By land, by sea or by air the world we see around us has been shaped by the technology that has enabled us to move people, goods, and services. Aviation, the youngest means of everyday transport, has radically transformed society in just over a century.

Demand for air transport is linked to economic development and at the same time air transport is a driver in an economy. Nearly all States work to encourage the growth of aviation in one form or another. All States acknowledge the need for the stringent regulation of activities in their airspace.

4.5 billion people moved around the globe by air. Well, that is until the COVID pandemic struck[1]. Even so, there’s an expectation that global air traffic levels will start to exceed those of 2019 when we start to get into 2025 and beyond.

One quote, among many, sums up the reason for the safety regulation of flying, and it is:

“Aviation in itself is not inherently dangerous. But to an even greater degree than the sea, it is terribly unforgiving of any carelessness, incapacity or neglect.”

[Captain A. G. Lamplugh, British Aviation Insurance Group, London. 1930.]

Here the emphasis is on aviation safety and security as the top considerations. In fact, ask an airline CEO of the number one priority of their business and that’s likely how they will answer, if on the record. Much of that open expression will be sincere but additionally it’s linked to the need to maintain public confidence in the air transport system.

We need to remember that aviation had a shaky start. Those magnificent men, and women in their flying machines were adventurous spirits and born risk takers. That is calculated risk takers. Few of them lasted long unless they mastered both the skill and science of flying.

In the post war era, improvements in aviation safety have been dramatic. As the number of hours flown and the complexity of aircraft has grown so has the level of flight safety. Aviation has been an uncompromising learning machine. A partnership between States and industry.

Sadly, in part, the framework of international regulation we may now take for granted has been developed because of lessons learned from accidents and incidents, many of which were fatal.

[1] https://www.icao.int/sustainability/Documents/COVID-19/ICAO_Coronavirus_Econ_Impact.pdf

Fatal accident in Nepal

My condolences to all those people who have been affected by the catastrophic aircraft accident in Nepal. On-board the ATR 72 aircraft operated by Nepal’s Yeti Airlines were 72 people – 4 crew members and 68 passengers.

The aircraft took off from Kathmandu at 10:33 (local time) on Sunday. At around 11:00, while on approach to the airport the twin-engine ATR 72 crashed into a riverbed gorge located between the former airport (VNPK) and new international airport (VNPR). Nepal’s Civil Aviation Authority said the aircraft last contacted the airport at 10:50. There are no reports of distress calls from the aircraft before the accident.

As only a short time has elapsed, it’s good to hear that the accident flight recorders have been discovered[1]. It is reported that they are to be sent to France for replay and analysis.

Sadly, Nepal has a grim record in respect of fatal air accidents. There have been 42 fatal air accidents since 1946[2]. Poor weather and hazardous terrain can often be a problem in this nation. However, in the case of this tragic flight, video circulating on social media indicates clear skies at the time of the accident.

Nepal became a member of International Civil Aviation Organisation (ICAO) back in 1960. Nepal’s improvement in safety measures and compliance with international standards was recognised by ICAO in 2018. However, Nepal remains on the EU Air Safety List.

Prior to the accident, Yeti Airlines has 6 ATR 72 aircrafts, aged between 11 and 15 years old.

The new international Pokhara Airport[3], was inaugurated on the 1st January, this year by Nepal’s Prime Minister. This was seen as a significant step to boost tourism in the region. The airport project was a cooperation as part of China’s Belt and Road Initiative (BRI)[4]. The new international airport was built to replace the city’s former airport, located 1.6 nm to the West. Flights were gradually being transferring to the new airport facility[5].

The Civil Aviation Authority of Nepal (CAAN) has checked the airworthiness of the ATR aircraft on its register. No technical faults have been found[6].

POST: Teams of aviation experts, including those from ATR and EASA are on their way to Nepal to help in the accident investigation French team starts probe into Nepal plane crash (msn.com)

[1] https://www.reuters.com/world/asia-pacific/search-resumes-four-people-missing-nepal-after-deadly-air-crash-2023-01-16/

[2] according to Flight Safety Foundation data

[3] http://pokharaairport.com.np/

[4] https://www.telegraphindia.com/world/nepals-pokhara-airport-was-inaugurated-two-weeks-ago-and-built-with-chinese-assistance/cid/1910031

[5] https://aviationweek.com/air-transport/safety-ops-regulation/yeti-airlines-atr-72-crash-nepal-kills-least-68

[6] https://nepalnews.com/s/nation/caan-carries-out-technical-tests-on-all-atr-aircraft-operational

AI2

There’s not just one form of Artificial Intelligence (AI). This group term hides a great panoply of different configurations, shapes, and forms of applications.

One of the most impactful applications is that of machine learning or expert systems. It’s where we go beyond a conventional computer’s ability to store and manipulate information against set rules. It’s where the machine has the capability to learn new ways of interpreting information and thus becomes different every day of operation from the day it was switched on. That’s a bit vague but it captures the essence of moving from deterministic to non-deterministic systems.

In all this we do presuppose that such complex systems are in the hands of able and highly illiterate users who understand what they are doing in training that learning machine. There’s debate about how bias in algorithms can produce unintended consequences. In addition, a reliable and trustworthy machine can be trained in a way that embeds errors and biases too[1].

Just as a child picks up the bad habits of a parent, so “intelligent” machines can learn from pilots, controllers and engineers who may have less than optimal ways of undertaking tasks. This Human-AI interplay is likely to become a major area of study. As the topic of Human Factors is itself a large body of material.

Already with the debate on social media it is all too obvious that the aviation community has a wide range of views on the use of AI. All the way from utter rejection, or scepticism deeming such systems as “unsafe” to advocates who profess only the benefits and merits of such systems.

Clearly, both extreme ends of the spectrum of professional views don’t help much. I don’t think that the promoters of AI want to see blind overreliance on it. Equally, surly even ardent sceptics can see virtue in making the best use of the accumulated knowledge that is available.

I can foresee a system of systems approach. With my parent and child analogy, from time to time a child will ask a question that is blunt and to the point. A question that demands a straightforward answer. This can be uncomfortable but hits out at biases and bad habits.

In aircraft systems there are boundaries that must be respected. The physics of flight dictate that going beyond those boundaries is generally not good for life and limb. So, a system programmed to question an expert system, one AI questioning another AI, or even question its trainer, is not beyond the realms of possibility. It might even be a good idea.

[1] https://www.nature.com/articles/s41746-022-00737-z