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JetBlue A320 Lost 100 Feet in Altitude Upset Before Software Issue

JetBlue A320 Experiences Altitude Loss Following In-Flight Upset
US investigators have reported that 22 individuals were injured aboard a JetBlue Airways Airbus A320 after the aircraft experienced an in-flight pitch upset, resulting in a sudden loss of approximately 100 feet in altitude. The incident occurred on October 30 last year while the plane was cruising at 35,000 feet over the Gulf of Mexico. This event has since led to a widespread grounding of Airbus A320 family jets to facilitate urgent software modifications.
Incident Details and Initial Findings
Preliminary findings from the National Transportation Safety Board (NTSB) indicate that the upset occurred in smooth air and clear weather conditions. Among the 124 occupants on board, which included 18 passengers and four cabin crew members, all sustained minor injuries. Following the incident, the flight, originally en route from Cancun to Newark, was diverted to Tampa for an unscheduled landing.
In the aftermath, the aircraft’s elevator and aileron flight control computers were sent to the French aerospace company Thales for detailed examination. Additional components were forwarded to their respective manufacturers for further testing and data extraction. Airbus has identified the software controlling the elevator and aileron computers as a potential contributing factor, although investigators have yet to determine the definitive cause of the upset.
Software Vulnerability and Industry Response
Airbus’s analysis uncovered a possible vulnerability in the flight control software that could be susceptible to data corruption, potentially triggered by external factors such as solar radiation particle strikes. As a precautionary measure, thousands of A320 and A320neo family aircraft were grounded in late November while operators reverted to a previous, more stable software version. The precise nature of the software vulnerability and the specific trigger for the JetBlue incident remain under active investigation.
The incident has heightened safety concerns for JetBlue, which now faces the dual challenge of restoring passenger confidence and addressing intensified regulatory scrutiny. The broader airline industry is also preparing for increased oversight and pressure to improve safety protocols and transparency. Competitor airlines are conducting their own reviews of aircraft systems and operational procedures in response to the event.
Market Impact and Ongoing Investigation
The repercussions of the incident have extended to financial markets, with JetBlue’s shares declining amid a broader quarterly loss attributed to adverse weather and the government shutdown. The ongoing investigation, coupled with the extensive grounding of Airbus jets, highlights the operational and reputational risks airlines confront when technical vulnerabilities are exposed.
The NTSB continues its investigation as regulators and manufacturers collaborate to ensure the safety and reliability of Airbus fleets worldwide.

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