Airbus SE announced on Monday that it has successfully updated the “vast majority” of the approximately 6,000 A320-family jets affected by a recently identified software issue, moving swiftly to prevent significant operational fallout from its largest-ever recall.

The European plane maker’s action stems from an Alert Operators Transmission issued on November 28, which called for immediate precautionary measures on certain in-service models.

With approximately 6,000 aircraft in the global fleet initially identified for checks, the aerospace giant now states that fewer than 100 jets remain to be modified before returning to service.

“We are working closely with our airline customers to support the completion of these final modifications,” an Airbus spokesperson said.

The company acknowledged the operational disruption caused, apologizing to airlines and passengers for resulting challenges and delays.

Airbus extended thanks to customers, authorities, and employees for their support, reiterating that the decision to ground affected aircraft was rooted in its “safety above all” protocol.