What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Departing runway 11, at about 200 feet AGL the pilot reduced power to climb power. At this point the engine started to run rough, cough and produce only partial power with surges. Pilot immediately selected gear down (20+ second extension time) and slipped the aircraft to land on the remaining runway versus proceed beyond the end into the trees. Aircraft touched down prior to complete extension of the landing gear, yielding damage to the right and more so the left float near main wheels (they extend last). Aircraft stopped at very end of runway safety area. Aircraft was able to be moved with dolly placed under float near left main wheels.
As the FAA filed it
DEPARTING RUNWAY 11, AT ABOUT 200 FEET AGL THE PILOT REDUCED POWER TO CLIMB POWER. AT THIS POINT THE ENGINE STARTED TO RUN ROUGH, COUGH AND PRODUCE ONLY PARTIAL POWER WITH SURGES. PILOT IMMEDIATELY SELECTED GEAR DOWN (20+ SECOND EXTENSION TIME) AND SLIPPED THE AIRCRAFT TO LAND ON THE REMAINING RUNWAY VERSUS PROCEED BEYOND THE END INTO THE TREES. AIRCRAFT TOUCHED DOWN PRIOR TO COMPLETE EXTENSION OF THE LANDING GEAR, YIELDING DAMAGE TO THE RIGHT AND MORE SO THE LEFT FLOAT NEAR MAIN WHEELS (THEY EXTEND LAST). AIRCRAFT STOPPED AT VERY END OF RUNWAY SAFETY AREA. AIRCRAFT WAS ABLE TO BE MOVED WITH DOLLY PLACED UNDER FLOAT NEAR LEFT MAIN WHEELS.