Ethiopian Airlines Chief Executive Officer Tewolde Gebremariam speaks at the Africa CEO Forum in Kigali, Rwanda March 25, 2019. REUTERS/Jean Bizimana

KIGALI (Reuters) - Ethiopian Airlines Chief Executive Officer Tewolde Gebremariam said on Monday he expected the preliminary release of a report into the March 10 crash of its Boeing 737 800 MAX “maybe this week or next week”.

Tewolde told Reuters the airline may or may not attend a briefing in the United States by Boeing about a planned update to software that is a focus of investigation in two deadly crashes that have prompted worldwide groundings of the 737 MAX.