Intense solar radiation has exposed a critical vulnerability in Airbus A320 family aircraft software, leading to the grounding of thousands of planes worldwide until fixes are applied, marking the largest recalls affecting the company in its 55-year history.

The issue affects the Elevator Aileron Computer (ELAC B) with software version L104, which calculates elevation and controls flight surfaces, causing potential data corruption at high altitudes during solar flares.

This prompted the European Union Aviation Safety Agency (EASA) to issue an Emergency Airworthiness Directive (EAD) on November 28, 2025, mandating repairs before passenger flights resume.

WHAT HAPPENED?

The problem surfaced during a JetBlue Airways A320 flight (B6-1230) from Cancun to Newark on October 30, when the plane experienced an uncommanded pitch-down at 35,000 feet, injuring at least 15 passengers and forcing an emergency landing in Tampa, Florida.

Airbus’s investigation linked the sudden altitude loss, brief but severe enough to exceed normal limits, to solar radiation corrupting ELAC data, though the autopilot corrected the trajectory.

This marked the only known incident, but analysis revealed broader risks across A320ceo and A320neo variants.

FLY-BY-WIRE VULNERABILITY

A320 family planes pioneered “fly-by-wire” technology, where cockpit controls send electronic signals processed by computers like the ELAC to adjust elevators and ailerons, eliminating mechanical linkages for efficiency and safety.

Solar flares, intense bursts of charged particles from the sun travelling at light speed, can penetrate aircraft electronics at cruising altitudes, flipping bits in memory and corrupting elevation calculations in vulnerable L104 software.

In the worst cases, uncorrected faults could trigger uncommanded elevator movements, risking structural damages.

FIXES AND GLOBAL IMPACT

Airlines must revert ELAC software to L103 or replace the hardware, a process taking about three hours per plane, before the next revenue flight; passenger-free “ferry flights” (up to three cycles) allow relocation to maintenance sites.

Roughly 6,000 aircraft, nearly half Airbus’s single-aisle fleet, are affected, impacting carriers like American Airlines, Delta, and IndiGo, with disruptions during peak holiday travel.

Airbus and EASA prioritise safety, apologising for delays while coordinating rapid implementation.

BROADER AVIATION RISKS

Solar activity peaks every 11 years, with the current cycle heightening radiation events that already disrupt high-altitude communications; this flaw underscores growing dependencies on radiation-hardened avionics amid climate-driven space weather monitoring needs.

Future mitigations may include shielded processors or real-time solar alerts, but immediate groundings prevent repeats.

Global regulators echo the urgency, ensuring no passenger flights until verified safe.

– Ends

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This article is part of the FT Financial Literacy & Inclusion Campaign’s seasonal appeal. The appeal is supported by lead partner Experian, which is generously match-funding other donations.

It has become a rite of passage for every new generation of young adults to be labelled lazy and irresponsible by its elders, but Gen Z has probably had it worse than most. Accusations range from not making an effort at work to splurging on luxuries and a “Yolo” attitude to risky investments like cryptocurrencies and NFTs.

There are two important differences between Gen Z and those previous generations facing similar disdain. The first is that rather than pushing back on these characterisations, today’s 20-somethings have tended to embrace them, leaning into neologisms such as “quiet quitting”. The second is that new evidence suggests these behaviours are rational responses to worsening economic prospects: specifically, the increasing unattainability of home ownership.

In a pioneering study published last week, economists at the University of Chicago and Northwestern University used detailed data on the card transactions, wealth and attitudes of Americans to demonstrate that reduced work effort, increased leisure spending and investment in risky financial assets (including crypto) are all disproportionately common among young adults who face little to no realistic prospect of being able to afford a house. By contrast, Seung Hyeong Lee and Younggeun Yoo’s research finds that those for whom home ownership is a more realistic possibility in the medium term, or who have already attained it, take fewer risks and strive harder at work.

I have extended their analysis to the UK and find a similar picture. Young British renters who have little hope of cobbling together a deposit are much more likely to take financial risks — with online betting, for example — than their contemporaries who are on or within reach of the housing ladder.

Most importantly, Lee and Yoo use time series data and local house prices to show that the link between unaffordable housing and economic behaviour appears to be causal. Recent upticks in financial risk-taking, leisure spending and reduction in work effort respond to changing economic incentives. As housing affordability deteriorates, those who come to believe they are locked out of home ownership resort to a mixture of high-risk bets and what US economic commentator Kyla Scanlon calls “financial nihilism” — why strive and save when it won’t be enough to make it anyway? — while their better-placed counterparts tighten their belts.

The findings on effort at work are particularly notable. Gen Z is often characterised as lacking resilience in the workplace; many young employees have taken to social media to bemoan the pointlessness of the nine to five. The evidence suggests these changing beliefs and behaviours are grounded in economic reality as it evolves. It’s not that previous generations were more engaged in their work because jobs back then were thrilling, it’s that applying oneself at work used to be a means to an end. With the reward of owning your own home yanked out of reach, the whole thing feels futile.

The same conclusion follows from the increasing importance of parental help to climb the ladder. For most first-time buyers in the US, the UK and Australia, the biggest hurdle is not salary but down payment. Why stay late in the office to finish that project in the hope of a modest pay rise when you know you’ll end up needing a six-figure deposit that might take decades to build up regardless?

The results of these studies have important implications. First, they underscore the critical urgency of addressing the home ownership affordability crisis. The impact, as we can now see, is destabilising the wider economy and society, setting many young adults on a slippery financial path where mis-steps may prove unrecoverable.

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Second, they highlight the importance of providing young people with the financial literacy they need to navigate a new world where for many the only hope of success is to take big monetary risks. Today’s 20-somethings are much more likely to end up as life-long renters than their parents were. This means they will need more guidance than past generations on other means of wealth accumulation, as well as the skills and support to know that it’s not yet game over.

It’s all very well bemoaning the growing economic nihilism of younger generations — and the evidence bears it out — but they’re just playing the cards they have been dealt.

john.burn-murdoch@ft.com, @jburnmurdoch

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