The report shows it rapidly lost height and hit the ground 30 seconds later.
This preliminary report by the Air Accident Investigation Unit Ireland says the engine power of the light aircraft was reduced as the aircraft maintained around 3,200 feet.
Witnesses who saw the aircraft at different times, told investigators it appeared to be flying normally
There were no witnesses to the final moments of the accident.
At 21 minutes past 6 the light aircraft rapidly lost height and hit the ground 30 seconds later at a field in Belan County Kildare halfway between Baltinglass and Athy.
Two men died as a result of the crash.
The AAIU says the investigation into the crash is ongoing and a final report will be published in due course.
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