Solar Flare Wake Up Call”: Airbus Urges Voluntary Checks on 6,000 Planes After Rare Radiation

Thousands of Airbus aircraft have been pulled from service worldwide after the manufacturer uncovered a vulnerability in which intense bursts of solar radiation could interfere with critical flight control computers. The unprecedented move has triggered delays across global aviation networks as operators race to update software or replace hardware.

Approximately 6,000 A320 family aircraft are affected, representing nearly half of Airbus’ global fleet. The majority are expected to return to service quickly through a software update, but almost 900 older models will require hardware replacement before they can carry passengers again.

The UK Civil Aviation Authority confirmed that travellers should expect “some disruption and cancellations”, although the impact at major airports has so far been limited.

Airbus said the issue was identified after investigators reviewed an October incident involving a JetBlue flight travelling between the United States and Mexico. During that flight, the aircraft experienced a sudden loss of altitude, injuring at least 15 people before making an emergency landing in Florida.

A320 family affected, from the smallest to the largest models

The vulnerability spans Airbus’ A318, A319, A320 and A321 models, which together make up the company’s most widely used narrow-body jets.

Roughly 5,100 of those aircraft can be repaired with a software update that typically takes around three hours to complete. The remaining 900 aircraft will need their onboard computers physically replaced, a process that depends heavily on component availability. Those jets will remain grounded until the work is finished.

Airbus said it recognised the significant challenge this presented to airlines and passengers and apologised for the disruption.

Disruption varies from airline to airline

Aviation analyst Sally Gethin told BBC News that the situation is “very much out of the ordinary”, adding that the scale of passenger impact will largely depend on each airline’s strategy for rolling out the fix.

“I understand that Lufthansa may take aircraft out of service to complete the update, whereas other airlines believe the impact will be minimal,” she said.

In the UK, airports have so far avoided widespread chaos. Gatwick reported “some disruption”, while Heathrow said it had not seen cancellations attributed to the issue.

Airline responses vary significantly.

• British Airways is understood to be minimally affected.
• Wizz Air and Air India confirmed they are already conducting updates.
• EasyJet initially warned of “some disruption” but later said it had completed updates on many aircraft and expected to operate a full schedule on Saturday.

In the United States, the problem emerged during the busy Thanksgiving travel period.

• American Airlines said 340 of its aircraft were affected and warned of “some operational delays”, although most updates were expected to be completed within two days.
• Delta Air Lines said the impact would be “limited”.

In Australia, budget carrier Jetstar cancelled 90 flights after confirming that about one third of its fleet had been grounded.

Tim Johnson, policy director at the UK Civil Aviation Authority, said the directive from Airbus “may mean some disruption, some delays or cancellations over the coming days”, but stressed that aviation remains “one of the safest forms of transport” due to rigorous safety standards.

Transport Secretary Heidi Alexander echoed that sentiment, saying the impact on UK operators “seems limited” and praising the speed with which the issue was identified and addressed.

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How the fault occurs

The problem stems from software responsible for calculating aircraft elevation. Airbus found that at high altitudes, intense solar radiation can occasionally corrupt the data feeding into these systems.

This interference is believed to have caused the altitude loss in the October incident. Airbus said it has not identified any other similar events.

The European Union Aviation Safety Agency (EASA) issued an emergency airworthiness directive requiring all affected aircraft to be updated or repaired before carrying passengers again. However, aircraft are permitted to operate ferry flights without passengers to reach maintenance facilities.

A rare grounding in aviation

The A320 family operates using a “fly by wire” design, meaning flight controls are processed electronically rather than through direct mechanical links. These systems rely on multiple layers of computer oversight, which makes the discovery of a vulnerability linked to solar radiation particularly significant.

Grounding such a large number of aircraft at once is considered highly unusual. Regulators and industry experts say this reflects the sector’s uncompromising approach to safety.

Airbus said it is working with airlines globally to complete updates as rapidly as possible, while passengers are advised to check with their carriers for the latest travel information.