History – Page 2 – John Vincent

Regulatory Insights

I can’t remember if my teacher was talking about maths or physics. His scholarly advice has stuck with me. When things get complex, they can seem overwhelming. Problems seem insolvable. So, it’s good to take a deep breath, step back and see if it’s possible to reduce the problem to its most basic elements. Do what could be called helicopter behaviour. Try to look at the problem top-down, in its simplest form. Break it into parts to see if each part is more easily comprehended.

Today’s international aviation regulatory structure, for design and production, follows the arrow of time. From birth to death. Every commercial aircraft that there ever was started as a set of ideas, progressed to a prototype and, if successful, entered service to have a life in the air.

This elementary aircraft life cycle is embedded in standards as well as aviation rules. Documents like, ARP4754(), Aerospace Recommended Practice (ARP) Guidelines for Development of Civil Aircraft and Systems are constructed in this manner. There are as many graphs and curves that represent the aircraft life cycle as there are views on the subject, but they all have common themes.

That said, the end-of-life scenarios for aircraft of all kinds is often haphazard. Those like the Douglas DC-3 go on almost without end. Fascinatingly, this week, I read of an Airbus A321neo being scrapped after only 6-years of operations. Parts being more valuable than the aircraft.

Generally, flight-time lives in operational service are getting shorter. The pace of technology is such that advances offer commercial and environmental advantages that cannot be resisted. Operating conditions change, business models change and innovation speeds forward.

My earlier proposition was that our traditional aviation regulatory structure is out of date. Well, the detail is ever evolving – it’s true. Some of the fundamentals remain. The arrow of time, however fast the wheels spin, mixing my metaphors, remains an immobile reality.

In airworthiness terms an aircraft life cycle is divided into two halves. Initial airworthiness and continuing airworthiness. This provides for a gate keeper. A design does not advance into operational service, along the aircraft life cycle, until specified standards have been demonstrated as met. An authority has deemed that acceptable standards are met.

I’m arguing, this part of the aviation regulatory structure is far from out of date. However much there’s talk of so called “self-regulation” by industry it has not come into being for commercial aviation. I think there’s good reason for retaining the role that a capable independent authority plays in the system. A gate keeper is there to ensure that the public interest is served. That means safety, security and environmental considerations are given appropriate priority.

To fulfil these basic objectives there’s a need for oversight. That is the transparency needed to ensure confidence is maintained not just for a day but for the whole aircraft life cycle. And so, the case for both design and production approvals remain solid. The devil being in the detail.

Flag Displays

Traveling here, travelling there, it’s not usual to see a national flag displayed. Whether it be on public buildings, airports terminals or stadiums it’s up there to celebrate belonging. National flags come out most often when major sporting events are underway. They appear and then disappear like a tsunami. It’s a field day for retailers. From the finest natural materials to the cheapest plastics, every size and shape is available.

I’ve kept a flags few, rolled up waiting for a special occasion. One Union Jack, a cross of St George, the European stars, a German one and a flag of the city of Cologne. I did have a Somerset County flag but now can’t find it.

Twice I’ve been to the last night at the Proms[1]. One of the fun parts of that evening is spotting the more unusual flags and trying to work out where they represent. Don’t tell me you know what the Northumberland flag looks like. I certainly didn’t until it was explained to me. By the way it looks like alternating red and yellow Lego bricks stuck together.

For me, as it is for most people, waving a flag is for a special occasion. Carnaval, a parade or Royal occasion. The Eurovision song contest, World Cup or Olympics. These are events where we come together as a community.

Frankly, going around and painting roundabouts red and white with the cross of St George, with cars whizzing around, is plain foolish. It detracts from the importance of the national symbol. What a grown man, in the recent News reports, thinks he’s doing with his tin of paint, I can’t fathom.

Flying Union Jacks, often upside down, from Motorway bridges is juvenile. Today, I saw one or two and it made me think that there’s likely three reactions.

One: ambivalence. That is, either not to notice or to ignore the display as much as ignoring the writing on the side of a large truck. Conveying no message other than what a waste of time.

Two: annoyance: That is, to go back to my point about degrading the symbol. Seeing the fixer as a pompous twat or intimidating bully with time on their hands. Stirring up political divisions for the sake of it.

Three: acclamation. That is, being distracted enough to put a big thumbs up to whoever bought the flag and tied it into position. On-board with plastering every road bridge with flags as an imagined rebellious act.

Doesn’t take much to figure out which one of those I might be. On this subject it’s as well to be as generous as possible. These acts of putting up flags for no reason obviously makes some people happy. Given that they are ranked number one in the world, I’d like to think that the flag waving is in support of England women and rugby union. Somehow, that’s a stretch given the utterances of the flag painters and the bandwagon jumping political stirrers.

Where public property is concerned it’s the duty of public authorities to take them down. Not to tolerate the defacing of public property. However, I can imagine this is just the provocation that some people are inviting.

POST 1 : Talk about utterly desperate bandwagon jumpers. Kemi Badenoch: It is shameful of councils to remove St George’s Cross flags | The Independent

Post 2: Now, I do approve of that. On the main A34 road someone has put up a County flag Berkshire Flag | Free official image and info | UK Flag Registry

[1] https://www.royalalberthall.com/tickets/proms/bbc-proms-24/prom-73

Aviation Regulations Outdated?

Machines, like aircraft started life in craft workshops. Fabric and wood put together by skilful artisans. Experimentation being a key part of early aviation. It’s easy to see that development by touring a museum that I’d recommend a visit. At Patchway in Bristol there’s a corner of what was once a huge factory. In fact, somewhere where I worked in the early 1980s. Aerospace Bristol[1] is a story of heritage. A testament to the thousands who have worked there over decades.

Fabric and wood played part in the early days. The factory at Filton in Bristol started life making trams. An integral part of turn of the century city life. Carriage work brought together skilled workers in wood, metal and fabrics. It was soon recognised that these were just the skills needed for the new and emerging aircraft industry. The Bristol Aeroplane Company (BAC) was born.

It’s war that industrialised aviation. Demonstration of the value of air power led to ever more technical developments. Lots of the lessons of Henry Ford were applied to aircraft production. Factories grew in importance, employing a large workforce.

My time at the Filton site was in a building next to a hanger where the Bristol Bulldog[2] was originally produced. This was a single engine fighter, designed in the 1920s, in-service with the Royal Air Force (RAF).

Right from the start orderly processes and regulatory oversight formed part of aircraft design and production. The management of production quality started as a highly prescriptive process. As aviation grew into a global industry, the risks associated with poor design or faulty production became all too apparent.

In the civil industry, regulatory systems developed to address the control of design and production as two different worlds. Airworthiness, or fitness to fly, depended on having a good design that was produced in a consistent and reliable manner. So, now we have a regulatory framework with two pivotal concepts: DOA (Design Organisation Approval) and POA (Production Organisation Approval). It took about a century to get here. Now, these concepts are codified within EASA Part 21, FAA regulations, and other national aviation authorities’ frameworks.

Here’s my more controversial point. Is this internationally accepted regulatory model, that has evolved, conditioned by circumstances, the right one for the future? Are the airworthiness concepts of DOA and POA out of date?

This is a question that nobody wants to hear. Evolution has proved to be a successful strategy. At least, to date. What I’m wondering is, now the world of traditional factories and large administrative workforces is passing, how will regulation adjust to meet future needs?

Maybe I’ll explore that subject next.

[1] https://aerospacebristol.org/

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

Composition of the House of Lords

Composition of the House of Lords (HoLs) is a subject whereby a length thesis could be written every week. Our UK Parliament comprises of two houses of widely different nature.

Whenever and wherever there’s a public institution that depends upon appointments made by individuals with a vested interest, there’s problems afoot. A couple of minutes looking at what politician Boris Johnson[1] did while he was Prime Minister (PM) is enough to discredit the whole appointment system. Conservatives have had a habit of thinking of the HoLs as their own private thiefdom.

Please don’t believe I’m damming all the members of the “upper” house of Parliament. There are numerous honourable and capable members, dedicated to public service, who use their time to ensure their expertise is applied to the scrutiny of legislation. The scrutiny of legislation is vital. It’s even more vital because the “lower” house of Parliament, The Commons, does such a poor job holding the Government of the day to account.

If I look at the total votes cast and seats for each political party as a result of last year’s UK General Election[2]. Yes, it was only just over a year ago. Then the political parties with the most votes cast for them do have a claim for proportionate opportunities to recommend new members for the HoLs.

Trouble is that UK General Elections (GE) can come along like buses. There are years of turbulence when the electorate are consulted in quick succession. So, the idea that the composition of the HoLs should reflect the last result of a GE, that’s for the birds. An MPs term of office is that time between GEs. A member of the HoLs sits for much longer, a lifetime.

Should the HoLs reflect proportionally the composition of The Commons? Well, this one too would merely copy the turbulence of electoral fickleness to both parts of the Houses of Parliament. Not a good recipe for long-term stability and decent governance.

Please don’t believe, because of the above, I’m saying that electing the HoLs is a bad proposal. Quite the opposite. It’s that electing the HoCs and HoLs at the same time for the same term of office isn’t a good idea.

For the time being we have an important public institution that depends upon appointments. That quiet exercise of favouritism and gerrymandering is a legacy that resists reform. Will one enlightened day turkeys vote for Christmas? Better not hold our breath.

[1] https://lordslibrary.parliament.uk/new-life-peerages-in-2023-boris-johnsons-resignation-list/

[2] https://researchbriefings.files.parliament.uk/documents/CBP-10009/CBP-10009.pdf

Do MPs Need Multiple Jobs?

It’s a question that has been raised time and time again. Is a Member of Parliament’s job a full-time job? What I mean is should an elected parliamentarian have more than one job? Do they need it?

Say, a journalist, presenter, documentary maker, official of a political party or union, company director or even a doctor.

There’s a repetitious ding-dong argument that goes on along the lines of – look at this example of great achievement and they were both occupied doing numerous jobs at the same time. Equally there’s the argument – look at this talented person who crashed and burned as a result over commitment and lack of attention to detail. Case by case examples can be found.

Sadly, a case built on individual examples of achievement, or the reverse doesn’t move things forward much. It’s a sort of selective sampling to prove a point. Fame and notoriety play a part too. When a hero, genius, guru or an influencer complex exists rules get bent. Mythical qualities can be ascribed to the subject of attention.

It’s true that some individuals have a capacity for work that goes way beyond the norm. An intellect that shines bright. A refreshing originality or perspective that changes the game.

Now, I’m a down-to-earth straightforward liberal. It’s does matter if you are a King or a Queen, an Olympic athlete or a massive titan of industry or a brilliant orator we are basically all the same. We see the sun rise and we see it set (weather dependent). We walk the same Earth. We are as likely to experience mental or physical challenges in life as any other human.

Back to my question. Is a Member of Parliament’s job a full-time job?

I’d start with the ways and means MPs get elected. It’s rare, if ever, that an individual is so well known that they step into a parliamentary seat with no affiliation, preparation, finance or support. Those people who provide such essential back-up have expectations. Expectations that the candidate, if elected, will dedicate their full-time efforts to their new role when in office. Not too much to ask, methinks.

Given that you and I have finite time and energy, playing multiple roles inevitably dilutes the time and energy available for any one role. Super humans haven’t been invented – yet. Whatever the myths. If a British MPs job is genuinely full-time then where does the extra time and energy come from to do another job?

By saying that an MPs job is not full-time, hasn’t the local electorate been sold a pup. I’m sure that when votes are cast in each constituency an expectation is set-up that a candidate will do a decent job if elected. A moral commitment is made as good as any binding contract.

I agree, that polarising this argument to the extreme isn’t helpful. MPs must manage their time and energy between home and work as most people do. I guess, what’s important is the prioritising of parliamentary duties to the degree they deserve. In other words not taking on equally demanding jobs at the same time.

Some of the cynicism towards British politics, that exists today, stems from MPs abusing their duty by prioritising income and / or notoriety in some other public facing role. Making being a Westminster MP merely a way of achieving other personal goals.

It’s not easy to make hard and fast rules for the above situations. A moral imperative should prevail. Sadly, it doesn’t aways go that way.

Desperate Politics

I’ll be generous and say that I don’t think Jenrick knows what he is doing. I’m taking about the Conservative British politician Robert Jenrick[1] who is, or has been by the time this gets out, the Shadow Lord Chancellor. Desperately ambitious politicians do all sorts of foolish things to get a headline. With the Conservatives in the doldrums the word desperate is truly applicable.

When looking at his published CV it’s reasonable to think that he might know something, at least the basics. At least some history. Yes, he’s just another well to do lawyer with an Oxbridge education but that’s so typical of Conservative British politicians. At least, he had some kind of working life before taking on parliamentary politics. Today, in Westminster he’s still a Johnny-come-lately having been first elected as a Member of Parliament in 2014.

Jenrick embraced social media to the extent that the right-wing of politics see him as a sort of top-ranking pinstriped influencer. Even if his amateur video antics look like an humourless Benny Hill dressed in a business suit and tie.

Today, he’s crossed a line. Stirring up hate at a time when problems need solutions not mindless rhetoric, is despicable. To say that “British women and girls[2]” are unsafe because of small boats is offensive propaganda designed to drive political debate into ever more nasty territory.

Yes, we have been here before in Britain. Conservative politician, Enoch Powell’s fiery “rivers of blood[3]” speech did a lot of harm, but it got him in the text books. Some do believe that the heart of the Conservative Party is English Nationalism. Wrapped up in the red and white flag of St George as an exclusive club of aggressive narrow-minded men and their followers.

I’ll be generous and say that’s not the conventional Conservative Party. At times of its greatest success, and let’s face it, that political party has been highly successful in winning elections, it’s been a broad church. A diverse party that has encompassed a wide range from woolly liberals to traditional imperialists.

If Jenrick thinks that jumping on bandwagons and stirring up hatred is the way to go he’s foolish. We are not in the 1930s, or even the 1960s, this is a new age and a challenging one at that. Social media was supposed to be a great educator and liberator. In some ways it is but within its walls are pits of despair and stinking wells of polarisation and Xenophobia.

Addressing the public disillusionment that exists by pointing the finger at one group or other as being the root of all our problems is totally mindless. It only seeks to elevate the profile of minor demigods and snake oil salesman (conmen).

Inflammatory speeches get headlines; there’s no doubt about that sad fact. For a moment eyes turn to the speaker, but history turns away from them. In comparison with the 21^st century challenges the country faces the so called “small boats” are a small one. Real solutions to real problems are needed not hideous grandstanding.

POST: Xenophobia is the fear or dislike of anything that is perceived as being foreign or strange

[1] https://www.gov.uk/government/people/robert-jenrick

[2][2] https://www.gbnews.com/news/robert-jenrick-britains-women-girls-endangered-migrant-crisis

[3] https://www.theguardian.com/world/2018/apr/14/enoch-powell-rivers-blood-legacy-wolverhampton

Why 12,500 Pounds?

Regulation is a strange business. It often means drawing lines between A and B. Bit like map making. Those lines on a map that mark out where you are and the features of the landscape. You could say that’s when all our troubles start but it’s been proven unavoidable. As soon as our vocabulary extends to words like “big” and “small” someone somewhere is going to ask for a definition. What do you mean? Explain.

For a while you may be able to get away with saying; well, it’s obvious. That works when it is obvious for all to see. An alpine mountain is bigger than a molehill. When you get to the region where it’s not clear if a large hill is a small mountain, or not then discussion gets interesting. Some say 1000 ft (about 300 m) others say much more. There’s no one universal definition.

[This week, I drove through the Brecon Beacons. Not big mountains but treeless mountains, nevertheless. Fine on a clear day but when it rains that’s a different story. This week Wales looked at its best].

Aviation progressed by both evolution and revolution. Undeniably because of the risks involved it’s a highly regulated sector of activity. Not only that but people are rightly sensitive about objects flying over their heads.

For reasons that I will not go into, I’ve been looking at one of these lines on a regulatory map. One that’s been around for a long time.

I cannot tell you how many discussions about what’s “minor” and what’s “major” that have taken place. That’s in terms of an aircraft modification. However, these terms are well documented. Digging out and crewing over the background material and rationale is not too difficult, if you are deeply interested in the subject.

The subject I’m thinking about is that difference between what is considered in the rules to be a “large” aeroplane and a “small” aeroplane. Or for any American readers – airplane. So, I set off to do some quick research about where the figure of weight limit: maximum take-off weight of 12,500 pounds or less originated for small airplanes (aeroplanes).

I expected someone to comment; that’s obvious. The figure came from this or that historic document and has stuck ever since. It seems to work, most of the time. A confirmation or dismissal that I wanted addressed the question, is the longstanding folklore story is true. That the airplane weight limit was chosen in the early 1950s because it’s half the weight of one of the most popular commercial transport aircraft of that time.

There is no doubt that the Douglas DC-3[1] is an astonishing airplane. It started flying in 1935 and there are versions of it still flying. Rugged and reliable, this elegant metal monoplane is the star of Hollywood movies as well as having been the mainstay of the early air transport system is the US. Celebrations are in order. This year is the 90th anniversary of the Douglas DC-3[2].

What I’ve discovered, so far, is that the simple story may be true. Interestingly the rational for the weight figure has more to do with economic regulation than it has with airplane airworthiness. The early commercial air transport system was highly regulated by the State in matters both economic and safety. Managing competition was a bureaucratic process. Routes needed approval. Thus, a distinction established between what was commercial air transport and what was not.

POST 1: There is no mention of 12,500 pounds in the excellent reference on the early days of civil aviation in the US. Commercial Air Transportation. John H. Frederick PhD. 1947 Revised Edition. Published by Richard D. Irwin Inc. Chicago.

POST 2: The small aircraft definition of 12,500 pounds max certificated take-off weight first appears in US CAB SPECIAL CIVIL AIR REGULATION. Effective February 20, 1952. AUTHORIZATION FOR AIR TAXI OPERATORS TO CONDUCT OPERATIONS UNDER THE PROVISIONS OF PART 42 OF THE CIVIL AIR REGULATIONS. This was a subject of economic regulation in the creation of the air taxi class of operations.

[1] https://airandspace.si.edu/collection-objects/douglas-dc-3/nasm_A19530075000

[2] https://www.eaa.org/airventure/eaa-airventure-news-and-multimedia/eaa-airventure-news/2025-07-17_dc3_society_celebrate_90_years_douglas_dc3_airventure25

Exploration and Innovation

Is there a human on the planet who has never seen the Moon? I guess, there must be a small number. The Earth’s satellite comes and goes from the night sky. Its constancy can’t be denied. Lighting the way when it’s full.

Accurate measurements say that the Moon is drifting away from us. The pace is nothing to be concerned about. It’s not going to become a free flying object careering across the universe. Space 1999[1] is pure fiction. Let’s face it we haven’t even got a working Moon Base here in 2025.

What motivated humans to go to the Moon in the 1960s? The simplest answer is the explorer’s quote: because it’s there. A quote that can be applied to any difficult journey that’s being taken for the first time. It implies a human longing to explore. An insatiable desire to go where no one has gone before. That’s nice, only it’s a partial story.

Technology accelerated in the post-war era as science and engineering built upon the discoveries and inventions that conflict drove. Then the promise of peace dissolved into the Cold War. Sides arranged in immoveable ideological opposition. The technological race was on. Intense competition drove the need to be display global superiority.

Potentially destructive forces were, for once, channeled into a civil project of enormous size. The Apollo missions. The aims and objectives of which were “civil” in nature, however the resulting innovations had universal applications. Companies that made fighter jets and missiles turned their hands to space vehicles. Early rockets were adaptations of intercontinental missiles.

1969’s moon landing put down a marker in history that will be talked of in a thousand years. Putting humans on the Moon for the first time is one of the ultimate firsts. That first “small step for man” may be as important as the first Homo sapiens stepping out of Africa. A signpost pointed to what was possible.

More than five decades have gone by. Instead of looking up to the heavens we now look down to our mobile phones. Rather than applying our intelligence to exploration we strive to make machines that can surpass us. Of course this is not a true characterisation. Exploration has merely taken a different a direction.

Will humans step into the final frontier again? Yes, but not as the number one priority. Plans to return to the Moon exist. It’s the intense competition that drove the Apollo missions that is missing. The advantage of being first to establish a working Moon Base is not so overwhelming. Even this base as a stepping stone to the planet Mars is viewed as a longer term ambition.

One advantage of this century over the last is the advances in automation and robotics that have become commonplace. Modern humans don’t need to do everything with our hands. Complex machines can do much of the work that needs to be done. Footsteps on another planet can wait a while.

Enough of us continue to be amazed and inspired by space exploration. The challenge is not to achieve one goal. It’s to achieve many.

POST: I watched Capricorn One, the 1970s movie about a fake Mars mission. It could do with a remake. In many ways it is easier to fake now than it was with film and colour televisions the size of washing machines.

[1] https://www.imdb.com/title/tt0072564/

Lowering the Voting Age

The line-up of predicable grumpiness is no more than might be expected. For once the UK’s Government has decided to bite the bullet and make a long overdue change. It’s time to bring the voting age down to 16-years old. This is a policy that has long been advocated by Liberal Democrats. Wisely so. Like it or not, we have a stubborn geriocracy in Britan. Political influence is top heavy. An agenda dominated by issues toping the polls with older voters.

Yes, we did see changes, a year ago with the last General Election. More younger candidates winning. However, the average age of a Member of Parliament[1] floats around 50-years. This average age hasn’t changed much over decades.

Studies on what motivates candidates to stand for election often point to community engagement and activism being part of their lives. It’s only when, in mid-life, opportunities present themselves and support can be marshalled that they stand for election.

And the retirement community of the House of Lords is solely built on the notion that age brings wisdom. Sadly, so often this does not ring true. Ten minutes watching the Parliamentary channel is a good way to see a range of speakers from erudite to senile. From expert to confused. From informed to delusionary. On occasion a few sleeping on the comfortable red leather benches.

When the elderly hold so much political power it’s difficult enough to get 18-year-olds to take an interest in voting. This is not an argument for the status-quo. Far from it.

Those in the age group 16 to 18 years are interested in society and the direction it’s taking. Youth activism hasn’t entirely perished in the world of tick-boxing education. Loading students up with enormous loans, with learning establishments seeing them as revenue generators, and deaf ears to their concerns has done a lot to supress youth engagement in elections.

There’s a lot to be said for “no taxation without representation”. Young people do work. They do pay taxes. They should have a stake in how those taxes are spent.

What’s not to be presumed is that a new youth vote will automatically lean to the left of politics. It’s easy to make that sloppy assumption. It may arise because the prominent youth activist who get media exposure are those campaigning on environmental and social issues. That does not say much about the majority who may choose to go to a polling station.

I think the larger number of young voters, despite the media stereotypes, will likely vote the way of their parents and friends. Having been nurtured in a particular way this is not so surprising. The lazy stereotypes of riotous youths biting the hand that feeds them is only true of a few, it’s not the majority. It’s belonging to dusty Woodstock documentaries.

It’s for the political parties to up their game and campaign with young people in mind. Even with the best of efforts election turn-out is still likely to be low. At least the message is that the next generation matter. If these modest changes are blocked because older people fear the next generation that is a very sad reflection of our society. Surely, it’s better to have younger people invested in their communities.

[1] https://www.parliament.uk/about/faqs/house-of-commons-faqs/members-faq-page2/

Aircraft Safety and Fuel Starvation

Unsafe. In common language it’s the opposite to being safe. So, take a definition of “safe” and reverse it. Let’s say to be safe is to be free from harm (not a good definition). That would lead to “unsafe” being subject to harm or potentially being subject to harm. The probabilistic element always creeps in since it’s the future that is of concern. Absolute safety is as mercurial or unreal as absolute certainty.

Let’s apply this to an aircraft. The ultimate harm is that of a catastrophic event from which there is no escape. Surprisingly, taking a high-level view, there are few of these situations that can occur.

Flying, and continuing to fly, involves four forces. Lift, Weight, Thrust and Drag. It’s that simple. An aircraft moves through the air with these in balance. Flying straight and level, lift opposes weight and thrust opposes drag.

Yes, there are other safety considerations. If there are people on-board. For example, it’s important to maintain a habitable environment. At higher altitudes that requirement can be demanding. Structural integrity is important too. Otherwise flying is a short-lived experience.

In the recent Air India fatal accident, the four forces of flight were not maintained so as to make a continued safe flight possible. The wings provided lift but the force that was deficient was thrust.

Two large powerful engines, either of which could have provided enough thrust, were unable to do so. The trouble being fuel starvation. Fuel starvation occurs when the fuel supply to the engine(s) is interrupted. This can happen even when there is useable fuel on board an aircraft[1].

Sadly, in the records there are numerous aircraft incidents and accidents where this has happened. Quite a few fuel starvation incidents and accidents occur because of fuel mismanagement. This can result from a pilot selecting an incorrect, or empty, fuel tank during a flight.

Now and then, it is the aircraft systems that are at fault. The pilot(s) can be misled by a faulty fuel indication system[2]. In one notable case, a major fuel leak drained the aircraft’s fuel supply[3].

When there is useable fuel on-board an aircraft, the imperative is to restart and recover. It is not uncommon or unreasonable for there to be a delay in restarting engine(s), especially when a fuel starvation event is entirely unexpected. Diagnosis takes time given the numerous potential causes of a starvation event.

In cruise flight there is time available to perform a diagnosis and take appropriate corrective action. Both take-off and landing have their hazards. Both are busy times in the cockpit. When looking at the worldwide safety numbers, less fatal accidents occur on take-off than landing. The numbers Boeing provide put take-off at 6% and landing at 24% of fatal accidents. Each one only occupies about 1% of the total flight time.

Although these are the numbers, my view is that, even though take-offs are optional and landings are mandatory, the requirements for adequate thrust are most critical during take-off. This is arguable and it reminds me that safety assessment is never simple.

[1] https://www.faa.gov/lessons_learned/transport_airplane/accidents/G-YMMM

[2] https://asn.flightsafety.org/asndb/322358

[3] https://asn.flightsafety.org/asndb/323244