US , Ethiopian investigators tussle over Boeing 737 MAX crash probe

Safety experts have also tussled over the interpretation of certain data and their presentation in the report, according to people from both countries

Tension is simmering between US and Ethiopian officials as investigators prepare to release in the coming days an interim report about the Boeing Co. 737 MAX jetliner that nose-dived after takeoff from Addis Ababa on March 10, according to people from both countries.

US investigators, according to people familiar with their thinking, have privately complained that Ethiopian authorities have been slow to provide data retrieved from the black-box recorders of Ethiopian Airlines Flight 302, which went down minutes into a flight to Nairobi, killing all 157 people on board.

American air-safety officials also have described what they view as an