I am the pilot and owner of AT3 19-4226 which was consumed by fire at Somersby 11 Feb 2021, and I am submitting this report to clarify and correct some commentary which has been made about the event.
the engine run-up was standard for a Rotax 912 i.e. 4000rpm, not 'a full power runup' as suggested on 20 April
the engine did not 'cut out' during the 'engine run' - it was shut down after the throttle had been retarded to the idle setting
the pilot did not 'manage to scramble to safety...after the engine had burst into flame' - once the engine was shut down, and the pilot noticed smoke observed coming from the engine cowl he vacated the airplane . Fire commenced several minutes later.
Other points: