Hong Kong aviation investigators say an engine problem that caused Cathay Pacific to ground its entire fleet of Airbus A350 jets for inspection earlier this month could have escalated into “extensive damage.

European regulators have pinpointed a potentially flawed cleaning process during maintenance as investigators probe an engine fire that caused a Cathay Pacific Airbus jet carrying 348 people to turn back to base.

Porsche may be signaling a shift in automotive engineering with recent patent filings for a six-stroke engine, hinting at the potential move from traditional four-stroke engines. The development could mark a major evolution in combustion engine technology,

It's been a long time since the automotive world has bothered with the mixing of oil and gas of the two-stroke combustion cycle — but soon, it may come time to rid ourselves of four-stroke engines, if a set of patent filings from Porsche for a six-stroke engine are a hint of what's to come.