Indonesian authorities have recommended that budget airline Lion Air improve its safety culture, in a preliminary report into last month's deadly crash.
On 29 October flight JT 610 crashed into the Java Sea shortly after departing Jakarta, killing 189 people.
The report is the most detailed look yet from authorities at the 11 minutes the plane was in the air.
However, it does not give a definitive cause for the accident.
The preliminary report by the Indonesian Transport Safety Committee said the airline should ensure the operations manual is followed "in order to improve the safety culture and to enable the pilot to make proper decision to continue the flight".
It also said the carrier must ensure "all operations documents are properly filled and documented".