The report has been being worked on since Mr Sala and David Ibbotson were involved in the crash in January 2019.
It will be published at 14:00 today, after a briefing which is due to be held looking into the crash at lunchtime today in Hampshire.
Crispin Orr, Chief Inspector of Air Accidents and Geraint Herbert, Investigator In Charge, along with a team of investigators, will be giving a presentation on the findings.
The report is expected to include the reason the Piper PA-46-310P Malibu went down.

Pictured: Emiliano Sala and David Ibbotson.
Footballer, Emiliano Sala died on 21 January 2019 while flying to the UK. His plane, being flown by Mr Ibbotson, crashed into the Channel near Alderney.
There has been no sign of Mr Ibbotson since the accident.
Earlier this week, it was announced there would be no further action against a man arrested in relation to the crash. He had been involved with chartering the stricken plane.
To read more about Mr Sala, Mr Ibbotson and what we know so far, click here.
More to come…
