PILOT'S INADEQUATE AIRCRAFT HANDLING DURING THE APPROACH TO LANDING AND LANDING FLARE PHASE OF FLIGHT. THE PILOT'S FAILURE TO RECOGNIZE AND AVOID A SITUATION FROM WHICH IT WAS IMPOSSIBLE-DUE TO THE WEIGHT OF THE AIRCRAFT, THE AMOUNT OF POWER AVAILABLE FROM THE ENGINE, AND THE PRESENCE OF OBSTACLES IN THE FLIGHT PATH- TO ACHIEVE AND MAINTAIN AN ADEQUATE AIRSPEED AND RATE OF CLIMB, RESULTED IN THE AIRCRAFT'S STALL/MUSH AND DESCENT INTO A WOODED RESIDENTIAL AREA.