What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The aircraft departed Oxford airport headed south and experienced a partial loss of power over the north end of thompson lake. Initial application of carburetor heat restored power. While turning back to Oxford airport, partial power was lost again. The pilot circled back to remain over the lake, until full power could be restored, as altitude was insufficient to reach the airport with limited power. The pilot chose to continue flying over the lake, anticipating power restoration to gain altitude for a safe return. Power was not restored before touchdown, and the aircraft landed on the lake surface, flipping over due to snow depth and conditions.
As the FAA filed it
THE AIRCRAFT DEPARTED OXFORD AIRPORT HEADED SOUTH AND EXPERIENCED A PARTIAL LOSS OF POWER OVER THE NORTH END OF THOMPSON LAKE. INITIAL APPLICATION OF CARBURETOR HEAT RESTORED POWER. WHILE TURNING BACK TO OXFORD AIRPORT, PARTIAL POWER WAS LOST AGAIN. THE PILOT CIRCLED BACK TO REMAIN OVER THE LAKE, UNTIL FULL POWER COULD BE RESTORED, AS ALTITUDE WAS INSUFFICIENT TO REACH THE AIRPORT WITH LIMITED POWER. THE PILOT CHOSE TO CONTINUE FLYING OVER THE LAKE, ANTICIPATING POWER RESTORATION TO GAIN ALTITUDE FOR A SAFE RETURN. POWER WAS NOT RESTORED BEFORE TOUCHDOWN, AND THE AIRCRAFT LANDED ON THE LAKE SURFACE, FLIPPING OVER DUE TO SNOW DEPTH AND CONDITIONS.