Lion Air and Indonesia's civil aviation authority are pushing back on conclusions reached by investigators probing last year's deadly crash of a Boeing Co. 737 Max amid concerns that too much blame is being placed on the Indonesian side, according to people familiar with the matter.

Lion Air expressed its objections to Indonesia's National Transportation Safety Committee after 25 of 41 lapses found in the NTSC's latest draft of the report were directed toward the carrier, one of the people said, asking not to be named discussing a private matter. The country's Directorate General of Civil Aviation also relayed its objections, another person familiar with the matter said.

NTSC Chairman Soerjanto Tjahjono said Monday investigators are still evaluating input from related parties before finalizing the report but declined to comment further. Representatives for Indonesia's DGCA and Lion Air declined comment. Boeing said it continues to "work with the investigating authorities on completing the final accident report" and declined to comment further.