What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot loaded medical passenger and flight nurse into aircraft. Reported started engines and taxied out to runway, performed runup with no apparent proble. Lined up with runway 14 center line and applied power for takeoff. Prevailing wind was on tail as reported by flight nurse. Pilot reported he felt left brake pedal go to the floor on takeoff. Reduced power and pumped left brake while aircraft rolled down runway. Took last turn off at the end of the runway when right brake failed. Aircraft left main landing gear hit a ditch along side of taxi way which stopped aircraft. The nose gear collapsed and both propellers contacted the ground. Statements from ground personnel stated that both main gear brakes were on fire when aircraft came to a stop. Post flight inspection showed that both brake assemblies failed due to excessive heat causing the packings to fail, allowing the hydraulic fluid to flow on hot disk, causing fire.
As the FAA filed it
(-23) PILOT LOADED MEDICAL PASSENGER AND FLIGHT NURSE INTO AIRCRAFT. REPORTED STARTED ENGINES AND TAXIED OUT TO RUNWAY, PERFORMED RUNUP WITH NO APPARENT PROBLE. LINED UP WITH RUNWAY 14 CENTER LINE AND APPLIED POWER FOR TAKEOFF. PREVAILING WIND WAS ON TAIL AS REPORTED BY FLIGHT NURSE. PILOT REPORTED HE FELT LEFT BRAKE PEDAL GO TO THE FLOOR ON TAKEOFF. REDUCED POWER AND PUMPED LEFT BRAKE WHILE AIRCRAFT ROLLED DOWN RUNWAY. TOOK LAST TURN OFF AT THE END OF THE RUNWAY WHEN RIGHT BRAKE FAILED. AIRCRAFT LEFT MAIN LANDING GEAR HIT A DITCH ALONG SIDE OF TAXI WAY WHICH STOPPED AIRCRAFT. THE NOSE GEAR COLLAPSED AND BOTH PROPELLERS CONTACTED THE GROUND. STATEMENTS FROM GROUND PERSONNEL STATED THAT BOTH MAIN GEAR BRAKES WERE ON FIRE WHEN AIRCRAFT CAME TO A STOP. POST FLIGHT INSPECTION SHOWED THAT BOTH BRAKE ASSEMBLIES FAILED DUE TO EXCESSIVE HEAT CAUSING THE PACKINGS TO FAIL, ALLOWING THE HYDRAULIC FLUID TO FLOW ON HOT DISK, CAUSING FIRE.