Operators of some 6,000 Airbus A320-family aircraft scrambled over the weekend to undertake software modifications to mitigate the risk of uncommanded flight control inputs from what the manufacturer terms "intense" solar radiation.
Airbus identified the issue during its probe into an Oct. 30 incident involving a JetBlue A320. The aircraft, en route to Newark from Cancun, suddenly lost altitude while in cruise.
An A320 "recently experienced an uncommanded and limited pitch down event," EASA's EAD said, without identifying the specific flight. "The autopilot remained engaged throughout the event, with a brief and limited loss of altitude, and the rest of the flight was uneventful. Preliminary technical assessment done by Airbus identified a malfunction of the affected ELAC as a possible contributing factor."
The aircraft had the newest ELAC software installed. Airbus determined reverting to the previous version eliminates the risk.
https://aviationweek.com/air-transport/safety-ops-regulation/easa-orders-immediate-airbus-a320-flight-control-software
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