Airlines Make Quick Work Of Airbus A320 Family Updates

On November 28, 2025, Airbus issued an emergency safety alert to some of its customers, revealing that they discovered a major issue which could affect upwards of 6,000 Airbus A320 family aircraft including A319s, A320s and A321s.

This follows an investigation into an incident involving a JetBlue Airbus A320-232 registered N605JB. On October 30, 2025, JetBlue was operating flight B6 1230 from Cancun (CUN) to Newark (EWR). During the cruise phase, the aircraft experienced an “uncontrolled pitch down event for about 4-5 seconds” before the autopilot corrected for a loss of about 100 feet.

The violent pitch down action resulted 20 people being injured. As a safety precaution, the crew decided to divert to Tampa (TPA). The incident was later investigated by Airbus, and they determined that the aircraft’s Elevator aileron computer (ELAC) malfunctioned as a result of exposure to intense solar radiation. This exposure could corrupt data on the ELAC, resulting in the unit malfunctioning.

Airbus issued an Alert Operator Transmission (AOT) to operators worldwide, requiring technicians to roll back the affected ELAC software to an earlier version. In some cases, this required techs physically changing the ELAC units. Of the 6,000+ identified aircraft, about 900 of them required hardware changes.

Airbus and various civil aviation bodies required that the affected aircraft be grounded until these software and hardware changes were made. Affected operators saw various degrees of impact, with carriers like JetBlue and Avianca being among some hardest hit.

Avianca, for instance, was forced to pause bookings across the board until December 8 while JetBlue canceled a number of their flights over the critical post-Thanksgiving weekend. These operators were harder hit as they were the few requiring hardware swaps, unlike most others that could simply perform a software rollback.

Operators such as American, Indigo, Easyjet and Wizzair saw little to no impact as they carried out the required software changes overnight, resulting in business as usual the next morning.

Credit: Bradley Wint/Gate Checked

Airbus has since provided an update, saying that the overwhelming majority of aircraft have since been updated, with less than 100 units of the 6,000 still pending modification.

“Following the publication of an Alert Operators Transmission (AOT) on 28 November calling for immediate precautionary action on a number of in-service A320 Family aircraft, Airbus is providing an update on the status of the deployment of these measures across the global fleet.

“Out of a total number of around 6,000 aircraft potentially impacted, the vast majority have now received the necessary modifications. We are working with our airline customers to support the modification of less than 100 remaining aircraft to ensure they can be returned to service.

“Airbus apologises for any challenges and delays caused to passengers and airlines by this event. The Company thanks its customers, the authorities, its employees and all relevant stakeholders involved for their support in implementing these measures, and for their understanding of Airbus’ decision to put safety above all other considerations.”

Professor Mathew Owens, Professor of Space Physics at the University of Reading, theorizes that solar particles from the Sun could impact the microchip on the Elevator aileron computer, resulting in some of the stored 1s and 0s flipping, causing a glitch which resulted in the JetBlue flight descending in an uncontrolled manner.

“Particles from space, mostly from the Sun, can occasionally strike an airplane’s electronics. Because aircraft fly where the atmosphere is thinner, more of these high-energy particles are able to reach them. When one passes through a microchip, it can flip a tiny “bit,” the smallest unit of digital information in the microchip, stored as a 0 or a 1. This creates a glitch known as a single-event upset, which can make an electronic system behave in unexpected ways.

“However, we still do not know whether this had anything to do with the situation Airbus is looking into, or what sequence of events they are investigating. As more information emerges, we will get a clearer picture of what actually happened.”

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