It's been a year-long wait for answers for next of kin of the victims killed in the Lion Air jet crash.
Families gathered to hear explanations by Indonesian investigators ahead of the release of a final report.
One hundred eighty nine people died on the Lion Air 737 MAX jet shortly after it took off from Jakarta.
The 737 MAX was grounded worldwide after a second deadly crash in Ethiopia 5 months later in March.
Investigators told victims' families in the closed-door briefing that mechanical and design issues contributed to the Indonesian crash.
Contributing factors included incorrect assumptions on how an anti-stall device functioned and how pilots would react.
Those here to receive the conclusions said they weren't satisfied, with relatives expressing disappointment that direct responsibility wasn't assigned.
One said sanctions should be applied to the airline.
The final report will be released publicly on Friday (October 25).