National Transportation Safety Board

Boeing Chief Executive Dave Calhoun took responsibility on Tuesday for a near-catastrophic Alaska Airlines incident last week, vowing "complete transparency" as the aviation giant tries to pivot from its latest crisis.

United and Alaska Airlines both reported on Jan. 8 that loose hardware had been discovered on some of their Boeing 737 MAX 9 planes during preliminary inspections after a dramatic mid-flight incident last week.

An international group of agencies is investigating the loss of the Titan submersible, seeking to determine what caused it to implode while carrying five people to the Titanic.

A book of condolence and a portrait of Petr Kellner are on display at the PPF Group company's headquarter in Prague, Czech Republic, 29 March 2021. EPA-EFE/MARTIN DIVISEK

"Our best estimate is that the report is likely to be completed and published this summer," a spokesperson for the NTSB told BIRN.

The U.S. transportation regulator announced a special investigation on March 7 into the safety record of Norfolk Southern Railway, a month after one of its trains derailed and released toxic chemicals in an Ohio town.

A Turkish engineer died in a plane crash on a lake in Napa County in California on May 8, U.S. media reports have said.

The single-motor ICON A5 Amphibious Light Sport Aircraft, which has the ability to land on both land and at sea, crashed on Berryessa Lake around 20 minutes after takeoff, ABC7news reported quoting officials.

Authorities who carried out their first full day of investigation into a US spacecraft crash that killed one pilot and seriously injured another Nov. 1 said probing the incident could take a year.