What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) While taxiing for takeoff, the accident aircraft was overturned by propeller wash from an adjacent P-3 aircraft performing a static runup on the taxiway. Pilot/instructor was not advised by ATC that the aircraft was performing a static runup, and took reasonable precautions to avoid the propeller wash of the P-3 aircraft.
As the FAA filed it
(-23) WHILE TAXIING FOR TAKEOFF, THE ACCIDENT AIRCRAFT WAS OVERTURNED BY PROPELLER WASH FROM AN ADJACENT P-3 AIRCRAFT PERFORMING A STATIC RUNUP ON THE TAXIWAY. PILOT/INSTRUCTOR WAS NOT ADVISED BY ATC THAT THE AIRCRAFT WAS PERFORMING A STATIC RUNUP, AND TOOK REASONABLE PRECAUTIONS TO AVOID THE PROPELLER WASH OF THE P-3 AIRCRAFT.