What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
N3378K was taxing to the run up area prior to departure from Whiteman Airport. While entering the run-up area, ground control called and issued a transponder code. The pilot looked down to enter the code in the transponder, when he looked up he noticed an aircraft in the run-up area. The pilot braked hard to avoid hitting the other aircraft. N3378K nosed over as a result of the hard braking. The propeller and the lower engine cowl contacted the ground. Both the propeller and the engine cowl were damage by the ground contact.
As the FAA filed it
N3378K WAS TAXING TO THE RUN UP AREA PRIOR TO DEPARTURE FROM WHITEMAN AIRPORT. WHILE ENTERING THE RUN-UP AREA, GROUND CONTROL CALLED AND ISSUED A TRANSPONDER CODE. THE PILOT LOOKED DOWN TO ENTER THE CODE IN THE TRANSPONDER, WHEN HE LOOKED UP HE NOTICED AN AIRCRAFT IN THE RUN-UP AREA. THE PILOT BRAKED HARD TO AVOID HITTING THE OTHER AIRCRAFT. N3378K NOSED OVER AS A RESULT OF THE HARD BRAKING. THE PROPELLER AND THE LOWER ENGINE COWL CONTACTED THE GROUND. BOTH THE PROPELLER AND THE ENGINE COWL WERE DAMAGE BY THE GROUND CONTACT.