Investigators were not able to pinpoint the cause of four Rolls-Royce Trent 700 engine inlet cowling panel failures, but regulators and the manufacturer are confident that changes, including a new design and reduced in-service inspection intervals, have sufficiently mitigated risks.

British Airways (BA) passengers faced widespread delays throughout the airline’s network Nov. 21 as a technical problem led to cancellations and frustrated travelers.

The aviation industry is “too defensive” in the discussion on environment and sustainability, Lufthansa CEO Carsten Spohr said at the IATA Wings of Change event in Berlin.

Air Wisconsin pilots approved a new three-year contract on Nov. 21, ending a decade-long management dispute that the Air Line Pilots Association (ALPA) called “one of the longest-running conflicts” in the union’s history.

The UK government will provide 50% of the cost of a 30-month, £18 million ($23.3 million) demonstrator project to convert the nine-passenger Britten-Norman Islander to hybrid-electric propulsion for short-range flights such as inter-island routes.