Ethiopian Airlines officials say a draft report prepared by Lebanese authorities blames pilot error for a 2010 crash that killed 90 people.
They reject the findings of the report, due to be released Tuesday.
Airline officials say the report blames the pilot for not following instructions from the control tower.
Ethiopian Airlines managing director Tewolde Gebremariam said Tuesday he believes Lebanese authorities withheld information and that their final report is incomplete and biased.
Captain Desta Zeru says that the airline believes an explosion in the air caused the crash.
Ethiopian flight ET409 went down in bad weather shortly after take off from Beirut in January 2010 and left no survivors.