The engine defect in the Airbus A350 plane that led to the cancellation of dozens of Cathay Pacific flights in early September could have escalated into "extensive damage", according to a Hong Kong probe released Thursday.

Chu pleaded guilty plea to having seditiously worn a T-shirt with the protest slogan "Liberate Hong Kong, revolution of our times". The message - chanted on streets during the months of pro-democracy protests that rocked Hong Kong in 2019 - had been deemed capable of inciting secession in a separate national security case.